i wired it to the top of the right visor, i unplug it at night, no hardwiring, straight cord is just long enough.
from the front outlet under the front glovebox(much under, where there are 3 screws and panels are different colors) up the right pillar behind the soft rubber seal to the visor level and neatly attached to the inside of the left side of passenger visor

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2007 4.8i X5 - Monaco Blue/Beige
Sport - Tech - Cold Weather - Rear Entertainment - 3rd Row Seats - Premium Sound - Rear Climate