Which relay should be used to control trigger on/off

Hi, I need help about Relay which will work in this method. I have signals from spindle pwm (arduino cnc sheild board) and I want torch trigger should be on/off with relay.

I have Plasma already connected backside have AC 220v and Power on button in front of unit. Now Torch will fire when the trigger button press.

I want relay should do on/off trigger. when take signals from cnc shield torch should be on/off.
Torch wires connections have in front of the plasma source anybody could you help me wiring.


I have seen this on youtube but him dont have wiring.