I've changed cmos batteries before but this is a little different. There is a black plastic piece cover a 1/4 of the battery. It's attached to the disconnect clip. (What you would push in to get the battery to come out) How do I remove this? I started prying but stopped myself as I'm afraid of breaking the plastic. If anyone can help me I would appreciate it.
http://imgur.com/a/FH0zY
http://imgur.com/a/FH0zY