Looking for a simple place to tap a 12 volt constant power source on the passenger side of a 2013 Ford Edge Limited. I am installing a LED & switch in the glovebox. I would like power to the LED with the ignition off.( in case I want in the glovebox at night with no ignition) Any help would be greatly appreciated. I`ve got the light & switch installed, but I`m not great with electric & I don`t want to mess up. Thanks....