Wiper linkage questions 67-9 cuda

The 67 2 speed setup I believe used either the Leece Neville or Prestolite V speed motor, and what made it a 2 speed was simy a wiper switch that had 3 detents off, low, high, and a big resistor on the back of the switch to slow the motor down to low speed.

68 up 2 speed setup the switch still had 3 detents in it, but the resistor for low speed was now mounted on the motor (corporate) 2 speed.