The above link is useful, I referred to that when fitting my Intravee and so needed to find the CD changer cables. You don't need to remove any of the carpeted side panels, in fact I didn't even fully remove the panel at the back as I just released it from the two clips top right (above the box that houses the battery) and pulled it out of the top trip and there was enough room to do what I needed to do.
So if memory serves me correctly:
1. Take away the bottom carpet panel closest to the exit of the boot.
2. Take away the carpeted box that houses the battery.
3. Carefully pull out the clip on the floor that holds the other half of the floor carpet (mine just had the one).
4. Undo two clips (one pulls out, the other screws out IIRC) top right of the rear bulkhead carpet, above where the carpeted box lives.
5. Pull down the bulkhead carpet from the top right, and that about all you need to do!
If you were around north London I'd say come over and I'd lend you a hand as these things are so easy if you've done it once before!