Winegard gateway wiring

[Mikecon3]

I’m trying to add on the Winegard gateway to the preinstalled Winegard 360+. Under the cap in the camper is the antenna wires, and one 18 gauge wire that had a wire nut on it. There is also a blue and white wire that passes over the hole. That blue and white wire are tapped to a coax above and the other side of that intersection is the short single wire with the wire it I mentioned above. I assume the blue and white are positive and negative to power the antenna booster and the single wire is tapping off the positive? Does that sound right. The color code does not match what was coming off the booster so it may transition somewhere. Before I tear it all apart I figured I’d ask and see if someone knows the answer.