Likely the factory prewire option, not something that an owner would run wiring for if they weren't going to put the camera on it. Really it is just a plastic housing / mounting plate with a small power wire tied into the running lights on the trailer.
My 2020 201BHXL came with the same pre-wiring and I just ordered the 4.3" camera setup from here:
https://www.forestriverelectronics.c.../fos43tasf.htm
I came across that link on this forum somewhere and it's far and away the best price, says it's shipping out today.