Here is a PDF of how my Genie HR44 with Genie Mini is hooked up in my 5th wheel.
http://www.n5na.net/download/DirectvRVHookup.pdf
You'll have to figure out how your RV is wired. Do not run the satellite connection through the TV antenna power switch. My trailer has a two port TV connection plate. The lower connection comes in directly from the outside connection. The upper connection goes to the TV antenna power switch. To use the TV antenna there is a short jumper between the two connections on the plate. To use the satellite I just connect to the bottom connection.
I recently added a second two port TV connection plate so I could route the satellite cable directly to the second TV in the bedroom. Otherwise there was no direct connection to the second TV, only the connection from the TV antenna power switch.
I just take my Genie and Genie Mini from home when we go camping.
For me the hardest part of using the satellite was getting the dish aimed. I finally purchased an Orbital Tracker OTM500 used off eBay for about $50. That's the best investment I've made! Makes aiming simple.
Good luck!
Alan