Satellite Connection

Was looking at the docking station and was wondering how to connect a satellite dish to the unit. There are four connections in the center two for roof connection and two to tv's. Why the two connections for each?

satellite connections

MD BUCK; You didn't say what your make or model is, so this is how the Bighorns are. There is a lot of info on the forum on satellite connections so do a search. The short story is 1 goes to tv in bedroom, 1 to the entertainment center 2 are coiled in the roof by the bedroom rear speaker for a rooftop satellite dish. JON

Thanks for the info. model is Big Horn 3670.