I have decided to hard wire in my Valentine detector, as I had it in the last car. I would like to place it low on the windshield, and run the wires back behind the dash, through a vent or grommet or something back there. I need to find a power wire I can tap into for the detector. On my last vehicle I used a switched power lead (for the cig. lighter I think) so the detector turned itself on and off with the car. People have any idea where there might be a suitable wire in this car before I start pulling panels?