This suggestion is for infrequent users, like me, to help remind them which leads go where. Most useful after doing DCEN stick welding, then switching back to TIG or Plasma. Put tags on the leads. I did this after I first got my PP256 and was checking out all the functions. After doing some stick welding, switched to check-out Plasma cutting and didn't change the work clamp connection. Needless to say, the Plasma torch DID NOT like the backwards polarity. The labels will make sure that can't happen again. Beats digging outClick image for larger version. 

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ID:	1011 the manual to check your memory.