I just received my M5HP On-Wall speakers and I'm attempting to wall mount them using the supplied on-wall bracket. Unfortunately, I think I'm doing it wrong. Can someone confirm how much copper should be exposed when stripping the wire? I'm assuming that the jacket needs to pinched between the "plates" when tightening the hex screws - correct? I tried only pinching the bare copper between the plates and there is no way I can tighten the screws enough to keep the wire in place without sliding out. So I'm assuming I only need to strip 1/4" or less and keep enough of the wire's jacket to be pinched between the plates. Please confirm.

Of course, I've now stripped the hex screw so I can no longer use it and will need to get a new wall plate from Axiom. So I want to make sure I do this correctly on the other 3 speakers that I need to mount.

Cheers!

Bryan