Hi Chopper Bill.. My take on this is ,,, 1 'F' connector goes to the LR entertainment center and the other 'F' connector goes to that loose coil of coax in ceiling.
If you were to install a dish on the roof ,you would use the coil of coax in the ceiling to connect to the dish, Then you would screw on a jumper from one 'F' conn to the other 'F' conn that is located in the dockin sta.. This will feed sat signal from roof to LR entertainment center..