Square end is at speedo and the slotted end is at drive end. What is supposed to engage that slotted end? A special nut that holds on sprocket, some kind of adapter? When I look in hole after disconnecting drive from plastic cover all I see is some kind of nut holding on sprocket, nut has a round hole in it I see nothing that the slotted cable end fits inside, in fact when I bolt up drive it does not go in far enough to engage or slide into any other part associated with sprocket. I suspect there is something missing that the flat end fits into. Anyone have any pictures of theirs that I could compare mine to or vice versa? Thanks, Maxi