I have a 325ext with the 220v outlet in the back for a cooler. I'm building my own cooler and have no idea how to plug into that outlet as it's the reverse of what a computer monitor plug would go in. My thought all along was to snag a cord, chop the end and wire it up, but it's a female/female issue. Can I wire directly to whatever is behind that outlet??

Also, my plan is to run wire from the outlet to a switch, and then to my carbonator pump motor. I had issues with the welder tripping a 50amp breaker when turned on (tech said it was an inrush of current) and don't want to make that issue worse with the pump cranking up every time the welder is powered up.