Hi all. I need some help please. I want to make some fixings using self tappers into the van body. I'm fixing up some self made blinds and surrounds. I'm a bit worried about catching cables behind with the self tappers that might run from front to back. I have a skyline roof fitted if that helps. Where are the main wiring looks that run from the front cab to the rear? I have had some feedback on a previous thread but would really like some more reassurances before making a very expensive mistake! Any help appreciated!