Look for a square flip up door with coax connectors in it. If there are two connectors one is for cable and the other is for Satellite.
The Satellite is a "home run" cable to a wall pad. The CABLE one goes to the back of the roof AMP wall plate. To enable the cable to work, you have to turn off the amp. (Green light out).
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