that this is an amplified antenna, and does require power. However, many such antennae are designed to be used on metal (ie, grounded) body vehicles, which glass eggs aren't. I know all the running lights
on my old Starcraft (aluminum skin) only have one wire, and ground through the mounting screw to the trailer skin. Pop off the mounting screw covers on the antenna, and see if one or more of them have a ground strap going under the screw head. If so, you'll have to attach a ground wire to that point, and route it to an appropriate ground on the camper.
Alternately, don't do anything -- the antenna will still work, it just won't be amplified. Maybe it will work well enough for your uses.