Hello I need a 12V supply wire in the cab of my S60 Polestar. I at this time have connected into a source in the trunk panel but it is live all the time and I want only live when car is running. I have the wire hidden perfectly all the way to left side windshield roof area. Everything in trunk is hot all the time that I can find. The cigar lighter would be my best thought but getting to it to splice in and getting wire under carpet to left door sill area would be ideal then I could just use current wire with tons to spare but would be next to impossible to do I think. If anyone has any ideas I would appreciate it. I am quite mechanically inclined but just don't want to start trying to get places I have no idea about because if I marked a piece of trim etc. that would be a disaster. Under the front dash would be great or from under hood into cab would be great but no way through firewall I know of. Thanks for any input Bill The dealer had no offers of ideas but kinda one of those gray areas I think.