I am swapping out the speaker panel on my MMR for a WPC speaker panel. Everything is straight forward except for the ground wire seemingly from the speaker that is looped around a post under the speaker bracket and that post has a metallic compression washer holding the speaker bracket down. How do you remove/replace these compression washers so I can disconnect the ground wire and re-attach to the new speaker panel? Cut them off? Anyone know where to get replacement washers? Thanks!