Now...after removing the clear lense, I drilled a 3/4'' hole in the plastic on the side of my headlight... You could use a bigger bit, or hole saw even but 3/4'' inch was the biggest I could find, so I drilled it and then had to bore it out a little bit. Also note that I made a little notch with the dremel so the clip on the side of the plug-in on the wire lead could fit through as tightly as possible...
