I managed to mangle the torch cable by pulling it against a running grinding wheel; did not notice what was happening until it nearly cut through.
I have the replacement cable, but it is not clear how to detach the old cable.
There is a rubber boot leading up to fitting, which is attached to case with two nuts.
Right against the case is a thin nut, then right against this is a regular size nut that can be moved with a standard open end wrench.
The rubber boot cannot be pull away from fitting, so that leaves turning one or both of the nuts.
If I turn the large nut without holding the thin nut in place may twist/damage internal wiring.
I can get or fabricate a thin wrench to hold (or turn?) then thin nut if needed, but just afraid I will damage something trying to figure this out.
Any help is appreciated.