Thats what I did, except I was in a rush, (what else is new, LOL) so I used 4 philips screws with thrust washers and lock washers. The peice has "lips" if you will, which hook into the parking light opening, effectively registering and hiling the front in place. At the rear, it hooks around and into the wheel opening, which nearly holds it without fasteners at all. I found two per side into the fender did the trick.
Here's the installation from the front:
sorry...