The only purpose that rivets serves is to cover up a hole! Don't even know why it is there in the first place. FYI it is in the same spot that a regular b body has a hole for a screw. even if it were not there and water could run in the hole, all the water would do is run into the door channel area just like water hitting the window and running down the cat whiskers and out the bottom of the quarter drip holes.