MG-1 Trigger Input Question

I’m new here…so new that I originally posted this accidentally in the Moogerfoogers forum (profuse apologies).

I recently picked up an MG-1. I’m looking for some basic use cases or examples of how to use the “Trigger” input on the back panel. The original manual isn’t much help - just the one line that says “The TRIGGER input is simply a switching input - when the hot lead is shorted to ground, it will trigger the synthesizer”. Anyone have any example or description of how to use?

I’ve gleaned from the BOK out in the ether that Pitch jack would be where I would plug in another pitch controller, like an analog sequencer, ribbon controller, MIDI-to-CV converter, etc.

Any help here would be greatly appreciated.