I ran some (non coax) wires through the floor in the back corner of the cabinet under the TV with no problems. I sealed around the wires with silicon.
I had a dealer install of coax through the roof that was nothing but trouble and was never resolved as long as I owned the unit.
Connecting through the factory sat hook up is the way to go for a portable dish.
2015 Crossroads Cruiser Aire CAF27RL, 2018 F250 diesel crewcab SRW 4WD short bed, Trailer Saver hitch with Reese adapter on Ford OEM underbed 5th wheel connector.