With the year of the RV, we might be able to look at specifics on this drawing site:
https://www.winnebago.com/Files/File...ram/Wiring.htm
Meanwhile if you want to take a look at your RV for specifics. Look under the correct year, model, etc. and you may find it under Coax drawings.
I did a short look and it may all be pretty much the same at the roof, so on this wild shot, it looks like the coax comes from antenna almost direct to the wallplate where you can turn the antenna amp on off??
Have you found that little green button hiding on that plate that is likely hidden in some odd cabinet?
Perhaps check there for the other end? If correct on my guess and you locate that plate, the coax to the roof should be marked with blue tape per this drawing??? Red to cable input and green to splitter but there are numerous options involved so you may differ somewhat.
__________________
Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!