Join Date: Jun 2009
Location: Waalwijk, Netherlands
If you send me a message with your email address I'll send you the technical specs, manual and drawings for the AC installation. Originally the +ve cable went under the car all the way to the engine bay, but mine goes through the rear of the boot down the left hand side of the car under the carpet and through the firewall.
You're correct, the -ve just earths in the boot which doesnt seem to have given me any problems although I did need to add a second earth from the engine to the chassis in the engine bay