I have just received a XC40 recharge twin pure electric with a tow bar. I need to put a 12v socket in the boot to run a camp freezer as we live some 80km from the supermarket. The car does not come with one. My research seems to indicate that with the tow bar control module I can use a loom from Volvo part number 31435603 and/or 31363053 and/or 31439122. Anyone have any other knowledge or thoughts?