Seat tracks help needed

not an answer but have you tried putting the tracks in the car to make sure you have the orientation right = = everything lines up like its 'sposed to?
They came connected to the seats when I "garbage picked" them. Plus I'm talking about how the tracks connect to seat bottom.
1969 tracks as one example have one stud that goes into the seat frame & receives a nut at the front & a regular hex head bolt at the back.
It is from a 69 Dart; so are those studs available cause there is no way to tighten it down without having the nut interfere with the roller.