Steering pot interface question....

When building a "Segway" clone vehicle, does the steering pot modify the signal between the gyro/acc/mag board and the logic board (Ard-Uno)?

This is a crude diagram of the basic system. Does the pot on the steering tiller go between the Gyro and the main board?

I can not "see" it modifying the PWM signal between the Duino and the controller.

This is an extra control that a simple balancing robot does not have and is unclear to me.

Thx, Miz