I have been able to successfully run separate satellite feeds from the dish to two tvs in my fiver by using the satellite prep to main tv (TV 1), no problem. To TV 2, I use the cable prep receptacle on the outside. In my fiver, this receptacle runs to a splitter that is tucked inside the wall behind the rvs antenna booster plate. I removed the booster from the wall, pulled on the wires and out came the splitter that runs to all coax outlets. I identified the cable in coax and the coax that feeds the tv 2 location. Using a barrel connector, I connected these two coax wires hence bypassing the rv antenna booster circuit and now sending a continuous coax feed from the cable in receptacle to the TV 2 location. I hope this makes sense.
The key for me was that on my rig all coax cables meet at a splitter behind my booster. From here I could redirect the coax wires as needed.