There are at least a couple of power sources in the boot.
The CD connector on the left, behind the trim. Double connector, maybe tucked up at the top over the wheel arch. It used to be left on the floor behind the small cut-out in the trim, but it got wet, so later models had it looped back and taped to the loom.
There's the towbar.
Aerial comes from the rear right hand side window to a green amp in the roof.
