I routed the antenna wire through the hinge, under the weatherstrip and under the trim panel just inside the top of the hatch. Then, I just pushed the antenna wire in above all of the side window and door strips along the roof panel, down the front windshield pillar and under the dash on the driver's side.
Exact same install here, except I centered the antenna on the rear of the roof.
I also found that a very dull butterknife was a good tool to tuck the wire between the headliner and the door / window trim. You might have to temporarily remove the plastic housings from the connectors to get the wire under the weatherstrip at the hatch.
Be sure not to mix up the 2 connectors.
It is a very easy install once you start and shouldn't take longer than 15 or 20 minutes.