The blank you are looking at is a match for the Furrion back-up or Furrion observation camera. But, as stated above, you can put anything you want there. The wires will most likely be wired into the running lights. So, for the camera to be active when towing, your vehicle headlights will need to be on. The monitor will most likely plug into your tow vehicle USB plug for power, or a cigarette lighter type plug. So the monitor will run from the tow vehicle, the camera from the lights on the trailer. Yes, when you unplug the lights from the truck, the camera goes off.
2019 Montana High Country 375FL
2014 Chevy Duramax HD 6.6 - 3500 Diesel Dully Long bed Crew Cab