[BB_TX]

The three external coax connections going into a splitter with three outputs makes no sense at all. One sat input should go direct to an inside coax connector to connect one sat receiver. And the second direct to another inside connector to connect to a second sat receiver. And the one labeled cable should go to your antenna amp switch plate for switching between cable and air.

I would ring out those white coax cables to see which ones go to your inside sat connections. Then, if there is enough length, pull those to connect direct to the convenience center. If not enough length, try a coax “butt splice” to connect the correct white cables to the appropriate cables from the conv center.