2 speed wiper motor and a 3 speed switch plug??

The wiring harness, switch & wiper motor are different between 2 & 3 speed.

Yes, I agree. But I was wondering if I found a two speed under the dash connector, could I cut it in to operate the 2 speed motor without a lot of trouble regarding the wiring harness bundle under the dash?? Or should I change the motor to a 3 speed. I may have a hard time as the car is an a/c car and it is tough getting up under the dash to change motor cranks?