This may seem a little silly to you but I am containing my wires under the trailer. Not so much from road junk but more there are some animals in the sierras that like to eat into wires. Mostly car brake lines so my trailer will be protected but not my car

in this shot I did not want to buy bent pc's so I made mine.
It just makes sense to me but it does take longer to do.

I drilled out where the doors should be cut while the sides were clamped on the sides of the trailer.
Things in the works
a. I have some things to do to the vent before I can get serious about the Trolley roof. Still working on that part. Need to experiment with some of those ideas you folks offered.
b. I found one set of wires I had not put in in the cabin and had to add a hole in the floor for them. I plan to have outside door lights blue or purple for when I am coming back to the trailer at night.
c. I need to drill out the over head brake light lights holder for the wires then I can attach them.
d. I can now take off the walls and cut out the doors and then attach the walls to the outside of the trailer.
c. Have the wood or the outside framing for the hatch. Need to cut them and find wood for the center ribs. The center ribs will be thicker and contain wires for plate and over head lights. and maybe small speakers.
e. the wires that connect to the car are there but I have many connections to make before they fully connected to the lights.
F. Wood will need to be bought for the insides of each door and it is about time to order the windows from Grant, also same windows are in the BoxKite.
G. starting to figure out the Saddle bags. they will be 7" deep and 55 " long. The doors on the Boxkite are 14" farther back from the front then the Cross Bow so we will have more room at the back of the trailer then before.
h. Starting to figure the dividing wall between cabin and Galley.
I. Time to see if the roof cut for the cabin will fit or it I have some cutting to do.
J. Wife wants a trash can by her so I am working on container for it and a tissue holder with a place for her glasses. I will need the same on my side of the trailer.
K. it may take a couple of years before I have worked out the batteries for the trailer but the wires will be ready.
K1. support for the batteries
K2. how to connect 2 batteries
k3. building or buying a switch for running total trailer on one or the other battery, switch to join batteries or if one goes down what I said at the beginning is true.
k4. in line charger and it's connection to the land line that will be used in the galley when available
k5 is there solar in my future????
L. I plan to make the walls of the inside cabin into sections. So as I get around to those projects I need to finish I can pull down one section and install those things needed.
L1. Speaker wire will be put in and one day speakers will be installed into the walls of the cabin and the galley
L2. a cabinet is planned above the light switches, braces and supports will be pre-installed.
L3. above the doors I have a space for more storage or pull down shades or pull down screen. (I have a new plan for the screen door in the works)
M. The rear of the cabin will have drawers. a lite frame and cloth drawers held shut during travel with on large swing cabinet door. and the other side a place to hang clothing with cabinet door. in the center will be a shoot
to the galley and below that storage and a pull out drawer for a desktop to sit and maybe plugged into those future speakers.
N. The vent might one day have a heater too. maybe candle driven maybe dc who knows at this point.
O. LED light for the inside Trolley top
P. Reading lights are ready to be installed from the cabinet over head. each with it's own switch beside the bed.
Q the Cabinet above our heads is almost done. front cent is about to be attached and side panels, 2 cabinet doors are in the works.
R. two 8" wide Ceder fence pc's for the saddle Deck and to hold the rear lower brake lights.
S. LED side lights have holes drilled in the walls ready to be installed when the walls become attached.
T. Need to figure some type of inside light for the saddles probably battery driven.
U. The walls will be painted a little darker color of blue then the Trolley, the roofs and Galley will be painted white to keep us cool when we stay in the dessert.
V. the counter inside the galley is yet to be figure, cupboards above the counter are still unknown, but a plate and cup holder will be up there.
Plugs in the galley will be just above the counter but may move to the sides need to talk with others to see what worked or did not work for them.
There is much I have left out but it is time to go Ice me toe and think things through.
Ron