Mach 460 system. Front passenger side. Seems like the 2 black “disc” looking things top right/top left are screwed in (?) from the back. I tried pinching with a pliers and turning counter-clockwise but as you can see by the scrape marks across the top right black “disc”... not much luck. Can’t grip or even rotate it enough to thread it off.
I’m trying to replace the liner before the stereo install scheduled for this Wednesday.
Thanks!!