Got this from tech support. Wired right to the battery. #8 gage should be fine for my 8-10 feet distance from the battery. That perko battery switch and DC buss panel may find use in the boat I guess. Useless for the camper. One 30 AMP main fuse and two single 15 amp breakers for the hood and outlet. Really seems simple now. I can double up those breakers later if I need too.
You have to be a contortionist to get down there and work on this but what an upgrade.
Thanks Mcdavie for the direction.