Running the cables to the boot
You need to remove the kick panel for this, so break out your posidrive and undo the two screws.
Pull off the panel, note it is held in by clips all the way down, don't force them as they WILL break! Push the wires down into the gap all the way along, not too far, just enough so they wont get caught by the clips.
Lift up the rear seat and undo the two screws,
and with an assistant, feed the wires past the rear card and out through the lip near the screw.
Then feed the wires round the seat
and into the boot.