I have a Hobart handler stickmate LX 235 AC/ 160 DC welder an d what a generator, that can handle it.

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i am just after checking that welder and it shows the the tourch and earth go to the front . type in the make and model on the internet and it will show you a picture of your welder

SOURCE: hobart handler 140 mig welder gas wont shut off

Looking at the Hobart manuals, that is how they set them up at the factory.

One way to make a change to that is to wire in a solid state relay or solid state Triac and pick up an energizing voltage off of location RC2-1 or RC2-2 on the control board when the trigger is pressed, or as an alternate location from the feed motor through a resistor and rectifier. Once you know if the voltage goes low, or voltage goes high at your point of signal, you pick the contact you want on the relay so when the wire is feeding out, the gas is flowing. and when it is not feeding wire out, the gas is shut off.