Since the rack is aluminum, I was concerned about the ground on the antenna. To ensure the ground was good, I used a wire from the mount to the rack rail. I removed some paint on the rack rail and remounted the bolt. The one I chose is also under the rack slide so it's not really seen.
(Yes, I know I used a red wire for this, too, but I didn't have any black.
)
I discover, after tearing one wire out, that the best way to do this was run the ground from the rack rail first. Then move the rack back into place, cut wire to length, and attach to antenna mount.
That's it, enjoy.
