Well, they missed it. I made sure there was no paint covering the threads and dug around inside with a few tools, screwdriver, hole punch, whatever would fit in there. Instructions in the kit say 2009 and earlier, bottom hole is not threaded. Mine's a 2015 and it's not threaded. If you try to use the hole above it (third hole from top), the bracket blocks the end of the wrench from being able to insert in the top of the screw. Now I'm questioning their Quality Control? I guess I'll take it up to the dealer and see what they say.