1st grab a wire coat hanger an str8en in out. The cut in half.
bend the two peices into a shape of the letter U. shove the ends of it into those little holes as far as you can push them in. That should release the factory locks and then it should pull out with a little muscle and menuvering. just remember that all of those little holes need punched down art the same time before it will come out. Good luck. They are a pain then azz. later