71 Duster 3 Speed Wiper Wiring

You've got a 72+ 3 speed switch, and your '71 would have used a 2 piece connector and used a variable speed switch (same motor though). You'll need to source a variable speed switch and re-orientate your dash harness plug(s) to fit the footprint of the variable speed switch. The same plug(s) in 1971 were used for 2 speed and 3 speed applications. Manipulate them and they will fit together on both switches.

Or.......Source a 1972+ dash harness and disconnect the wiper wires from the plastic connector and use the plastic connector with your 1971 wires. Good luck.