Are your pics of connectors directly from the old controller or the wiring harness?
You may have already done this but looking at the online videos for motor and controller replacement as well as comparisons between the standard and premium models, that doesn’t appear to be the hall sensor connector, but one for accessories or other functions.
Can you provide pics of the existing controller that clearly show each connector and wiring? You could do a continuity check between your 12 pin connector and the hall connector at the motor to confirm whether or not the 12 pin is for halls as you guessed.