I'm confused as to what this cord is used for. I found it in a pawn shop a while back and haven't been able to figure it out. I've compared it to the miracle piano and its conversion kit for pc but neither of them have 2 controller ports nor are they missing the prongs from the NES end. I don't have a computrainer so I can't check that, but as of right now that's my only guess. Any help is appreciated!