For the cobra 75, I put the junction box under the seat. The power feed I used was a cigarette lighter plug going to the outlet on the rear of the center console. The antenna wire was run from under the seat, tucked under the door threshold panels and under the rear side panel, through the tail light assembly, and up the outside jamb area of the hatch to the roof. I mounted the antenna bracked on the holding screw for the cross piece of the roof rack, and use an EZ Over. Easy to install, virtually no cutting of the vehicle, and most of it well out of sight.
k_enn