AkechiMotors

The ones that float in the C pillar and to which the latch bolts (two, one on each C pillar that keep the rear seat back in the upright position) attach? I haven't removed the trim panels yet, but from the looks of it, the locators seem to be in the pillars themselves with no obvious way to extract them. They rattle around like loose change.

V2Rocket

just put a bolt back in the threaded holes and snug it down; it wont move anymore.
it is really an annoying sound when they are loose.

riviera 93

I did a bead of silicone sealer to secure the insert from rattling.

GPA951s

Made an alu washer. Then put a bolt in it... yea car sounded like a bucket of bolts before I did that