I have a Jayco Fifth wheel. Just recently bought a King Satellite and have a direct tv standard box. I have everything working fine on the inside of the RV. I have a outlet on the outside of the RV...
The "Output" connection from your Direct TV receiver must be connected to the TV "Input" connection. You'll need to figure out how to get a cable from your receiver connected to the outside TV.
If you have two receivers available, each one could be connected to each TV. If you go this way, two receivers, then you'll need two cables, one to each receiver, from the King Satellite.