Solder the Trigger-Cable to this Potentiometer cut the the trace - located behind the switch - right to the led - @the top of the PCB. > this because, the unpluged 6,3er socket is switched to ground - and @ ground - no trigger accours... ... it might be a good idea, to cut remove the Plug to get more free space 4 UI! or a big display, or maybe 16 Buttons 4 a sequencer... well i dont know - time will tell