My JACK ANTENNA came with one of these 120VAC Power transformer adapter and power injector adapters. You just plug this into the 120VAC receptacle. I didnt use them as my popup has the Wingard Antenna panel installed so all I do is push in the BLACK button which applies 12VDC power to the JACK ANTENNA,


I take it your POPUP does not have one of these antenna panels installed. Looks like this... I just connect my outside antenna into this F-connector and push in the BLACK push button. My outside antenna feeds this antenna panel inside my trailer.

You sure are a brave soul drilling holes in your POPUP roof...
I went with a PVC pipe with to of those steel short 5-foot antenna masts (LOWES) up the side of the popup which takes all of five minutes to install. I can reach out the window flap and rotate it.

I was using a LOWES $90 great big Channel Master VHF/UHF Antenna in this photo shown here which really worked great but after about 20-30 trips I finally destroyed it folding it back up for each trip.
I am currently using a BATWING on this setup now and it picks up 6-36 digital channels just about everywhere we go here on the East side of the US.
My JACK ANTENNA is a backup antenna at the house in case the cable goes out. It get 8 digital channels at the house.
Roy Ken