I have a mid -April Dearborn fastback with the early chrome triangle type stoppers vs the flat cup type on the rear flat fold down section. what would be the location and number/type screws to hold the panel securely down, the body assy and 65 shop manuals only show the flat cup type panel my panel has some sort of non metal filler in the frame of the panel that wont allow the rear screws to pass through to the spring hold down plates i will post a picture later today. thanks.