I had my front camera switch and radar detector re-installed today, by Steve from Syracuse Customs, after the original installer did a lousy job, damaging my wiring harness and resulting in it needing to be replaced, to the tune of $1850. Needless to say, I wanted to make extra certain that everything was done correctly this time. I couldn't be happier with the work Steve did. I am posting because he found two plastic grommets in the firewall that I have not seen anyone post about previously. He ran the cable for the front camera switch and two radar detector cables through a hole he cut in this plastic grommet, which he then sealed up. A picture of the grommet, with the cables already through it, is below. There are two of these grommets, one near the top left corner and one near the top right corner of the firewall. The one near the top right corner (as you face the car) is basically behind and below the washer fluid reservoir, and perhaps a bit to the right of it. That's the one pictured above. I know people have talked about cutting holes through the firewall, so perhaps some will find this post useful, as cutting a hole through a grommet seems simpler, and far less damaging to the car than cutting a hole through the firewall.