Exhaust grounding wire?

Hey guys

I’ve noticed a cut off braided wire underneath close to the middel section of the exhaust. The exhause was changed at some point in the car’s life, so I wonder if it was for grounding the oem exhaust pipe? Can’t find anyting in the usual manuals, could be a jdm feature? If it is what I think it is - worth reconnecting to the current aftermarket pipe? How important it is? (Guess mitsu put it in there for a good reason)…

Many thanks