2004 Winnebago Minnie 324v rearview camera

[Chronic]

I am hoping someone can give me a hand with my new-to-me 2004 Minnie 324v. I plan to put a Haloview wireless rearview camera on the RV and am trying to figure out whether it is pre-wired for a camera. I see the indentation in the rear cap with three plugged holes and wonder whether there are wires in there somewhere? On my last camper I pulled a wire from a marker light for a camera, which is what I planned to do with this one, but if there is wiring in that indentation, I would rather use it. Does anyone have any information about that spot on the 2004 Minnie 324v? Thanks for your help.

Ron