Here is a wiring diagram of the coax distribution in your RV:
I have included in this diagram the red lines which show how you need to connect the Channel 3-4 (coax) output of the Vip211k receiver back into your system.
The "Set 2" output from your antenna booster control plate goes into that secondary splitter. Just put your Sat receiver output into that splitter instead. Here's a picture of the back of the antenna booster control so you can tell which wire is the "Set 2" output. You can use an AB Switch
to make this easier to reconfigure when you want to deliver off-the-air signals instead.
Just connect your outside TV to the coax output in your photo then.