Most RV's are not setup to use a ground satellite antenna (of any kind). They have a cable connection but, in almost all cases, that won't work. The best thing to do (unless you see an outside connection that says Tripod or Satellite) is run a dedicated coax from a convenient location outside to the satellite receiver. In the meantime you can run a coax through the window or between the slide seal to the receiver but it's highly unlikely that without some minor modifications that a ground mounted antenna will work with the existing wiring.