Hi all, I am desperately trying to get a wire through to the battery area under the bonnet for a feed to a new 12v outlet and usb, these are being fitted in the rear area of my Kombi, the auto electrician is not interested/keen on using a piggy back fuse which is what I was going to do. I have 2 of these in already, one for front camera and one will be connected soon for USB in the pillars behind the front seats. WHERE AND HOW DO I GET THESE CABLES THROUGH PLEASE.