From what I remember hearing, the screws go into a threaded backing plate. You have to keep a screw in the backing plate or it will fall down into the door or frame. If you go to the DOAI website and do a search, I think you'll find what you're looking for.
Jim and Lynda, (Sophie, Jake, attack trained killer Shi-Tzus :-))
2003 Fleetwood Expedition 38N 2005 Saturn Vue