Well after some digging, I found the wires for the rear two speakers and the tweeters, but still nothing on the rear subs or door speakers. Looks like I'll be bypassing those and rewiring those speakers.
Anyone know how the rear seat cushion comes out? I thought it was like all the others and lifted up, but I can't seem to get it to release...
Thanks again!
Bottom cushion has two tabs about 9 inches from each end that you must press in on and then at the same time lift.
If you carefully insert a long screwdriver at under the seat cushion at the edge and carefully slide it toward the middle of the seat you will hit the tab.
Then slide the screwdriver out a little until you can keep sliding it toward the middle of the seat and you should be right on the button.
Push in and pull up the cushion.
Do the same for the other side...
This is really difficult to explain but it's a snap once you know how it works.
The seat back is bolted on.
You will see the bolts when you remove the bottom cushion.
BTW the Like the other guy said, the Mach is not the firendliest system to upgrade.
Neither are most of the stock high end systems though.
Good luck!