Pull the Winegard powered plate. Drill a hole in the lower half and install a barrel connector. Connect the rg6 from outside connection to a splitter, then a jumper from the splitter to the new connector and another jumper from the splitter to where the rg6 from outside connection was previously connected on the Winegard plate, which is typically the cable in, middle connection. The splitter must be "power pass" and you need to be sure the RV manufacturer did not bury another non power pass splitter in the line from outside connection to wall plate.