Re: power wire?
Also, there should be a boot on the drivers side you can run it through the firewall, down under the carpet after taking off the door sill all the way back to the back seat, under it, and into the trunk. That's how mine is ran anyway. As far as grounding goes, it's best to use a selft tapping screw and take a putty knife and scrape the paint away. If you use a screwdriver, it creates creases and doesn't get a good ground.