While getting gas, my daughter forced open the sliding door. Since I was standing their I was able to keep the door from totally smashing into the gas pump and breaking the gas access cover. A small little black plastic piece was knocked off the cover. This piece must be the part that lets one of the little buttons around the gas cap know that access cover is closed so that the sliding door opens. Now that it is not in the access cover the button is not pressed closed so the sliding door will not unlock to be open. I can't find a diagram so I can put the piece back. Anyone know how it fits back in? Thank you.