There is a blanking plate behind the nearside suspension turret in the front of the car to run your power cable through its easier and safer to run power cable straight down the nearside, run RCA with either the power cable or speaker cable. run speaker cable down offside. The pillar trim clips on over the top of the rubbers so should just require peeling of one side IE rear door then push to get of front door Hope this helps . I have an ECU type box under my rear seat do not use the earth point of this for your amp as it can create interference