1.) I guess I did forget to show the false floor panel.
In this pic you can see that there is a hump in the front, near the back seats. The axle runs directly underneath. This is a bit of a problem, because any, and all wires have to run under the amp rack. There are a pair of securement pads, that used to hold the third row seat in place. It rests on them, and there is juuust enough room for wiring to pass between it and the body.
I cut the amp rack pattern out of cardboard, first, and them transferred that to 1/2" birch. I used a jig saw, and sander until I got the shape right. After several fittings, I planned the placement of the amps. You have to allow for wiring to come through the rack, but not be sandwiched against the body, near the hump. I brought the power wire into the frame on the driver's side, and across the face of the 2x8 frame. It is under the amp rack, but because of the hump, I had to bring it in through from the underside in
front of the hump, and into the fuse block. Then, with the wires coming out from the fuses, and returning to beneath the amp rack, I cleared the hump, by going over it.
The rear most portion of the amp rack, was blocked by a pair of threaded studs used to hold the third row seat in place. I just drilled a couple holes to clear the studs, and carpeted over them. The SS Luxury Liner is about a 1/2" thick, so the studs stay below the carpeted surface. I also used spray glue to attach a bit of the same carpet on top of the visible Luxury Liner, between the rack & the frame. The carpeted frame, and rack cover the rest.
2.) I used a 5 ft piece of 14 guage ground wire from 14/2 Romex. Pop the grommet loose from the door, and feed the doubled up wire through to the interior, by the kick panel. It was a little more difficult on the driver's side, but if you feed it down to the bottom of the kick panel, there is a 2" square hole to feed the wire through. I used a pair of needle nose to grab the wire, and pull it through the rest of the way, After you get the fish through, insert the speaker wire, and pull it back through the door boot. This all, of course, presumes that you have the plastic kick panel trim off.
3.) I have 2 fans on the face of the frame, behind the rear seats. The same relay that turns on the amps, turns on the fans. I ran a wire from the fuse block to power the relay.