Appreciate your response / effort! The first diagram that comes up in my post is one I drew of what I’ve been implementing, you can sub the NPN Transistor for a MOSFET to cover attempts with that component type. Base to Gate, Drain to Collector, Source to emitter.

For all three of your diagrams, SW2 exists on the module PCB but it is being bypassed by my circuit. I have the resistor / drain / collector wired to “1” on SW2, “2” is the load of the rest of the Module (in my diagram, “2W Speaker and some ICs”)

The blue wire is my “Tripwire” / pulldown to GND. In the last picture, I haven’t even bothered attaching it to pull down the signal from Gate because I had been experimenting with different MOSFETs and finding they weren’t turning on all the way / letting any more than 2V through, which is not enough to power the speaker module.