A common problem form the rear view in caravans, campers or trailers.
A TOP Vision.eu view solution can provide the right solution here.
Below as an example the caravan.
-a (mini) camera back of the vehicle, for easier positioning when coupling the trailer, caravan, trailer etc. The tow bar
In addition, connected by a spiral cable and connectors:
-a camera back of the trailer, caravan, trailer or mobile home, to have a good view when reversing. With a dual lens camera or tiller you can have a view about what further happened behind the trailer also while driving (compare it to look in the rearview mirror of a normal car).
-in a horse trailer you can also attach a camera inside the trailer to see the horse during the ride.