Sitting here with my Nikon FM in front of me, and the MD12 motor drive I seriously wonder what the contacts do? You know, the small circular socket with four small contacts. Since this is one of the interfaces between the motor drive and the camera I suspect that they work for the shutter release, correct? But this would be weird since the FM is marketed as a completely manual camera. The shutter could also be actuated through the actual winder thing (the slotted mechanical connector), but that would also be a bit weird. I have this modification I would like to do so if anybody has any ideas on what the different contacts do, or could direct me towards any sites or so I would be thankful.