I will try and get some pics this weekend, by the time I get off work it's dark out now.
Really want to redo mine, was a lot of trial and error sadly.
For your remote wire the easiest thing is to get one of these fuse taps:
You plug that into a fuse that will be on when the car is like the radio, I believe that is what mine it connected to. You put it in place of the original fuse, plug the fuse you took out in and you need another fuse the same amp rating for the new circuit.
If you want you can add a switch, the wire running from the add-a-circuit goes to the power terminal on the switch (prob says 12v or something) and one to ground (there's a screw on the left of the fuse box) and then other terminal back to the amp.
Also, I didn't cut or solder any of the factory wires (did cut one by accident when I wasn't paying attention) I just used wire tap-ins and from the taps ran speaker wire to a plug in adapter that came with my amp. If you can, solder it like A7x did it looks a lot cleaner.