you need a plastic pin puller. looks like the claw off a hammer but flat so like a Y shape get some new plastic pins cuz some will snap. run all wires in the inner roof gulley or tap them to the roof using gaffer. id go via a fuse, but straight from your battery via a switch on ya bulkhead so you dont need to worry bout routing up near your dash. hope it helps earth through one of your fixing bolts or one of the bolts that hold the roof on