I may be able to help you some. The cable going to the ceiling is probably to the antenna on the roof. There should also be a tiny button near the cable connections ( in the old rigs it also had a 12v outlet) to turn on the antenna booster. The two speakers in the bedroom are probably connected to the stereo in the living room.
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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