OK, my replacement Paragon came in the mail yesterday so I am going to install her in my 410RBH. But there is some kind of sheath on the speakers wires that seems to slide over the contacts on the speaker, and I can't figure out how to get them to 'let go' of the contact to uninstall the old speaker. What is the trick? I don't see anything obvious. And once I get it to let go, how do I get it to grab back on? Thanks in advance!!