Hi @Virgil ,
I think it won’t (hopefully) hurt to test what you are proposing. Just wondering what is the purpose and function of the two chips then. Perhaps chips + 1-pole switch is a cheaper configuration than having 2P3T (on-off-on) switch? If the motor runs normally, just remove the circuit board and hook the motor directly to S1. If the motor runs too fast, then the chips are actually used for speed reduction (PWM).
Cheers, heke