PiMoRoNi don'rt seem to want to share how their power PIM shim works.

Assuming the button is read with a DC signal this should work.

^{simulate this circuit – Schematic created using CircuitLab}

PiMoRoNi don'rt seem to want to share how their power PIM shim works.

Assuming the button is read with a DC signal this should work.

^{simulate this circuit – Schematic created using CircuitLab}

If you can spare a second pole on that switch you could try this:

^{simulate this circuit}

if the button is read with a DC signal this should work.

^{simulate this circuit – Schematic created using CircuitLab}

PiMoRoNi don'rt seem to want to share how their power PIM shim works.

Assuming the button is read with a DC signal this should work.

^{simulate this circuit – Schematic created using CircuitLab}