Update:
Front speakers are wired in series, rear are series/parallel (the 2nd pair jumped off the 1st pair of rears).
I was concerned about having to re-wire everything but no need.
The fourth Wetsounds XS- 650 pair I installed on the dash just under the windshield, made a HUGE difference in the cockpit!! Have to tune back the rear channel now, passengers in the rear complaining it's TOO LOUD
The passenger side was simple, I used a compass circle cutter style blade to cut the 5" hole, took many revolutions. Then drilled a 3/8" hole in the rear of the glove box to run the wire back to the bow.
The driver's side same hole process for the 5" hole. I had to use a 4" hole saw to allow the speaker to sit another inch lower. Ran the wire to the front speaker.
Getting in all 4 screws in without taking out the windshield will be tricky. My buddy had an angled adapter bit and a couple short sharp screws.