Take out the bottom of the back seat. You can run the cable under the trunk lining and through to the backseat. The hard part is routing the cable to the center console from the backseat. I had to remove the back of the console and cut more of the opening to guide a clothes hangar from the backseat to the center console. This took the longest time.
Just a hint. 1. Guide clothes hangar to the center console. Tie string to clothes hangar and pull back. Then tie antenna to string and pull from the center again. I hope that was clear.