There is a single coax cable that is home run from the AUX/SAT connector (top one in photo) to the SAT labeled coax connector on the outside of the camper. NOT the one outside labeled CABLE! There should be TWO F-connectors outside in the square exterior plate.
Remove the wall plate and make sure they actually INSTALLED the SAT cable to the top F-connector.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW