I was able to find a nice set of conduits on eBay and dilled out the door and pillar for them. There are dimples in the sheet metal where you need to drill. I used a caliper to measure the outer diameter of the boot at each end to determine the size hole I needed to drill into each. They vary in size slightly from the pillar to the door. I had the luxury of the doors being off of the car when I did it, though.