Motor heater and cupe defa in Volvo V50 2005

Boys!

I need to install the motor and CUPE heater system in my volvo V50 of 2005. I bought the system in defa brand, but the wiring diagram does not come and the most annoying find the hole in the torpedo to pass the current cable to the CUPE heater.

Some of you install or have the diagram to avoid disarming the entire torpedo, because I am in Oslo and winter is strong to disarm everything at the door of the house.

Waiting not to freeze much ...