Yes, thats where the pots are defined. In config.h
#define POT_G AUX3
#define POT_A AUX4
I added a few channels on my transmitter for Aux 3 and Aux 4.
Also, you’ll see the ranges for the PID adjustments in the multiwii.cpp file on lines 649 and 650. I uncommented out the line that read int kpA = 3*kuA + 60; which gives a larger range for adjusting Level Pids.