Premeux fairing speakers

[bulldog]

After three years I decided to install a stereo in my Premeux fairing, after I split it I found that where you mount the speakers was a flat piece of tin with some slots that is to be the grill. Has anyone mounted speakers in these fairings, from the looks of it I might have to make some modifications as you can't mount the speaker directly to the so called grill because the speaker needs to vibrate to work.

Bulldog