Your right on both ends! I gave the wrong terminology.
In the back of my Motorhome, there is a large double door closet with a light, to the left of the closet is 5 draws and an open upper cabinet for a TV.
There is no way I can access the area between the ceiling and roof. Unless I make a square access panel. I don't even know yet, but I'm hoping I will see the top marker light wires.
I even thought to drill a hole from the outside next to the center top marking light all the way through to the inside of the closet, this was I can feed the transmitter wires to the camera outside and let the transmitter rest in the closet. For power, I thought to take the hole made outside and tap into the marking light next to it.
Unfortunately, I will only have power when the parking lights are on.
Right now I do not know of any other areas to draw power from.
Any suggestions. I'm sure im not the only one who installed a wireless camera in a Motor home??? Somebody on this forum must have an idea on where to get power.