Ryan's are much later latches - the male part that hooks into the housing is 1-piece on the GT40 type (as in posts #4 and #11), on this later type it is 2-piece so if it isn't properly fastened the top half sticks out like a flag. On these it is a spring that pushes the latch out rather than the bottom section of the "Press" tab. They aren't compatible with the earlier type so would need the correct 2-piece male part.
Regards,
Graham.
Regards,
Graham.