I have an actual home dish network disk on a tripod.
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It worked in my previous travel trailer. My living room was a snap to get going yet cannot seem to connect bedroom
In your pictures, the right hand wall plate coax connector goes to the coax connector near the bedroom TV.
The middle wall plate has 2 coax connectors. The coax connector marked satellite comes from the Universal Docking Center (UDC) and goes to the input of your receiver.
The output of your receiver goes to the right hand wall plate.
This arrangement works if you have a satellite dish with 2 outputs or a suitable splitter. One of the dish outputs goes to the bedroom coax connection in the Universal Docking Center (UDC).
This all works if the Joey operates on a signal coming from the dish, rather than from the Hopper unit.