For anyone thinking about doing this in a V60, it doesn't work - the DDM and PDM are responsible for the control of the ground lights in the V60, whereas the XC60 just has straight electrics from the CEM. I've done it in my V60, and in fact in the rear doors as well, but it took a lot of breaking into existing wiring, and using a relay to reverse the signal. And don't ask for an explanation, if you can't work it out for yourself, you shouldn't do it !!
