I did a Panda169 and have posted a guide. I decided to wire via a relay and keep things separte from the cars ECU. I think messing with the wiring needs to be kept to a minimum. I think the wiring detail might help I tapped the exisitng side light wires to energise the relay and fitted an illuinated switch. You will probably find lights on eBay but the Polish suppliers I used (most parts seem to origiante there) have dwindled since we left the EU. I have not had any success butying such things from brealers but you may get lucky. The difficult thing is finding a suitable site for a switch as the dash is likely to put up a good fight. ON the Panda there was no space available so the switch had to go in the central console.