If you're referring to a curved black plastic trim piece. It can be worked/pried off after the screws are removed. I had to use a 1/4" screwdriver to help the pry. Then there's a retaining nut over a flat spring washer that has teeth in its center hole, it holds a big spring in place. THE DAMN WASHER WILL FLY AWAY AS YOU PRY IT OFF. Put some duct tape on it as you pry that off, the tape should be over the ws header so it can't fly into another dmension. I lost both of mine and bought others from ebay. When you install, use a socket to press the trick washer down onto the threaded visor piece compressing that sping, it's teeth will keep it in place while you start the nut and then crank it down to taste. If you have lighted mirrors they'll be a PITA to reconnect, you can pull them off OK, but they need to be pressed back on. I got the pass one connected, I never use the driver one anyway. Phooey on it.
