I just finished setting up a wireless backup camera. I plan to mostly use this for hitching and backing up the trailer. Instead of installing the camera permanently to the TV, I use a butterfly LED work light case to mount it via magnets. Here are pics to show the setup.
There are 3 places of the magnets to put it on a metal spot of the TV
Perfect rear view for mounting, the monitor is easy to take off and store in the side pocket hidden
From the rear of the TT, the wireless signal is strong enough to get to the monitor inside the TV
Since the monitor and all its parts are on when in use, I could see the rear view going forward/backward to make fine adjustments.
I ordered a wired camera for $15, I plan to install it permanently to the TV; my 7" video monitor has 2 video input which is perfect for this application.