I need to take off a tail light to drill tiny vent holes in bottom. On the inside of the trunk on the ends of the bottom set of screws are some white plastic thingies with a quicktie molded onto the bottom to hold the wire loom. They have a 3 pointed star shaped recessed groove molded into them where they pass over the shaft of taillight mounting screw. They do not pull off & I can't loosen them since the wire loom is passing thru the attached quicktie & won't allow them to spin very far. Any secret methods to get these off without breaking anything? Thanks guys.