not just 1 screw. That screw helps hold the door panel to the door. The speaker cover has 4 mounting studs. I had to dril holes on the door panel to mount it then theres a hardware kit which I had to buy separately. It comes with hollow nuts that thread themselves to the plastic studs. Its kind of permanent. This set up has a tendency to break studs and then the whole set up has to be replaced.
heres the complete kit with the mounting hardware at LMR. I bought my covers from blue oval and they didn't give me the hardware.
http://www.latemodelrestoration.com/...ker-Grille-Kit
Heres LMR video showing the install
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