Hi Alfred,
I have not seen the snaps that hold down the rubber mats, but my guess is that they are probably the same...
The bottom part of the snap, the part that screws into the floor pan is the "inner part" of the snap, the male. The part that is connected to the carpet is the larger, outer part, the female part....
Bob
bpossel (Memphis, TN.)
'71 280SL / '97 E320