The antenna booster is usually a small button located with the main cable connection near the TV in the living area of the unit. However, some have the antenna booster located in other areas. I had a Blue Ridge fiver that it was located in a little area in the dresser of the front bedroom. At any rate, it will be with one of the coax connections for the TVs in the camper. As for the connection at the rear of the camper, you are correct, one is for cable and the other is for satellite. Satellite will only work with the TV in the living area in most campers. I have learned the hard way that if your antenna booster is 'ON', the cable will not work. There should also be a small indicator light, usually green or yellow, that will be lit if the booster is on.
Mike in Tennessee
2007 Cruiser 30QB
2008 Ford F250 Lariat 4x4 6.4 Powerstroke
Valley 16K slider
Ride-Rite air bags