Thanks guys. I'm actually trying to put the pin IN, not remove it. This blue part the arrow points to prevents the pin from inserting. You can see I damaged it a little fiddling with it. When that part is removed, it allows the pin to insert. Then it slides over the top of the pin to keep it in place. It won't push left out of the way to allow the pin to go in. But I think the only way to do that is to remove the entire white plug but I have no effing clue how to do that. That screw won't come all the way out.