1970 Duster starter wire question.

No idea WITHOUT PHOTOS!!! You "could" be talking about the starter relay, but the terminal on the relay that junctions power is a large bolt on stud and nut, not a "slide on" terminal

This is one that is connected incorrectly. The big stud on top is one relay contact, and a power/ battery junction. In this photo, the wire at the arrow in the middle "square" terminal is wrong. That terminal should ONLY have one wire which leads down to the starter solenoid (small terminal on the starter.

The yellow wire on the bottom is "start" from the key, and the bottom right, brown, is the neutral safety, which gets grounded in park or neutral, or if a stick, when you press in the clutch

dartstarterrelay-jpg.jpg