Run cables down the side of the centre consol which can be tucked under the consol from the side. Remove the rear of the consol by taking out your hazard flash light (pops out) and remove the screw. Remove the ash tray and take that screw out under it and your consol will be now loose. Take your back seat out. Bottom comes out by pulling the back up and remove. Back part comes out (pain in the ass) by pulling the top of the bench hard untill the clips unclip and pull seat up. Run the wires under the carpet rear of the centre consol and up the carpet infront of the seat then in your trunk via the premade holes in the back bench (great thing BMW already has a foam/rubber grommet there) Good luck.