Hi Pizza, and welcome to FRF!
In general, wiring diagrams are not available. Perhaps a VCross owner has created one they will share.
For the TV/Sat wiring I can help. The Sat cable (from the outside) should come directly to a coax outlet, usually near your main TV. It may be on a separate plate, or it may be a second connection on your Antenna Booster Control plate. In case you don't know, that looks something like this:
The Cable connection comes to the back of that Antenna Booster Control. When the little black button is pushed in, the rooftop antenna amplifier is powered on and the OTA antenna is connected to your TV. When the button is out (light off), the Cable input is connected to your TV. The other TV outlets in your RV are driven by a splitter also from the back of that booster control. Here's a general wiring diagram for that.
If you find more than one coax outlet at other TV locations, they may have tried to do something fancy with your Sat connection which can be a problem. Speak up if that's the case. I hope this helps.