Need help to identify plug on torch height control

[inspectweld]

I have the Torchmate 3 torch height controller box and set up and the torch height doesn`t work properly.
I bought this machine used and cannot get in touch with the previous owner to ask about the problem I'm having.
I looked at the owners manual and the wiring is in place on the power supply. (Hypertherm Powermax 1650).
I noticed a wire plug near the torch that is not connected to anything, just dangling there and I figure this might be the problem.
I wanted to know if any of you might be able t help me here, thank you

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[inspectweld]

Thanks anyway, I found out incidentally while searching the manual, it is a plug used for calibration by TM only and not used to actually run the machine and I did, for now anyway, solve the problem we were having with the AVTHC.