I purchased a back up camara that works with my Garmin seeing how I usually have it with me. It is wireless. I drilled a hole below the center lite on my trailer, removed the light housing, ran the wires to it. Bed is in the rear with cabinet above, drilled hole in ceiling inside cabinet to get the plug thru and mounted on the wall with double sided tape. Trailer is 32ft and Garmin receives signal just fine. Yes I have to turn the lights on to use it but I'm only backing up with it. Sealed the hole and resealed the light housing with caulk.