first, run a coax cable DIRECTLY from the Antenna to the Receiver, and make sure that it works ...
when it does, you can then decide how to best 'wire' it within the coach, if it has a 'sat ready' cable connection. While it would seem that this would be an intuitive connection, sat ready may only mean that the factory provided a set of 'pre run' coax cable(s) from somewhere on the roof(hidden, or under the roof covering) and down into the coach(into a cabinet, etc)... You have to add the Antenna of your choice, of course, and your own Receiver, to both ends of these coax cables.
Some RVs actually have a 'Sat' input coax port, such as in the wet bay, or near the normal 'Cable' port, where you may can attach a coax from your Antenna, but even sometimes those are suspect, depending on how the factory actually wired it(meaning, if splitters were used somewhere along the run).
Most of us get very creative when it comes to how we 'run' our Satellite connections, as even when the factory provides 'sat ready' wiring, we sometimes like our own ways better.
I have a coax cable coming into my bedroom slide seal, which feeds my bedroom receiver.
I have another coax cable that comes into my wet bay, and up into the living area via the plumbing 'chase' in the slide, and to the living area TV's receiver.
I have another coax cable that comes into my main bay, under my outside TV...
I also use either my 'portable' antenna, most of the time where it rides on the rear of the roof, when traveling, or my 'ground mount' antenna(the 'normal' open-faced type) when we are parked extensively.
You may find that you can find and access your 'sat ready' wiring, or you may find that it's actually easier and more conducive to your traveling style to 'wire' it yourself... There's no 'magic' to any 'sat ready' wiring from the factory, it is simply the same coax cable you have yourself.
'14 Thor Palazzo 33.3 compact diesel
KingTailgater2 Dish, 100w/5amps roof SOLAR, BlueOx, 100,000+mi since '14... US, Alaska, and Canada... GA, NC, now N AL : )