Thsi picture shows many things. I put in a 110v power strip for "in the wall" units, like 12v chargers, a terminal block for the 12v circuits. You can also see the lower duplex in place, the tan paint on the floor is the color of all the cabinets inside, and finally you can see that I put a latex stain on the particle board walls to protect them from moisture and water leaks and spills.