I went out to look at mine. I put clips where there were holes and this is what I have (sorry for the potato quality pictures, just snapped them with my phone:
Across the top: 5 clips. Relatively evenly spaced, but the center clip is offset to the right of center by about 1". There is another hole dead center (just to the left of center clip) but the hole was bigger than the screw, so I figured it was a build reference point or something.
Across the bottom: 6 clips (But I think I'm missing holes near each corner) two in the center are about 2" apart.
I think I'm going to shoot holes about 2-3" in from the corners along the bottom, and 3 evenly spaced holes down each side. That should hold the trim on.
![20170714_195535.jpg 20170714_195535.jpg](http://www.69roadrunner.net/mopar/data/attachments/21/21964-b3340e51c87b7f1d5c3e4084857e27fa.jpg)