If look at the fan shim circuit board, the round pad on the end opposite the one mounting hole is GPIO 17, physical pin 11.
If you look close you’ll see a circuit track / trace going out the bottom of that pad and then turning towards the switch. If you take an exacto knife and carefully cut that track so there is a thin gap in it. That pad will no longer be connected to the switch.
Like you’d do to change the i2c address on a breakout board.