bad engine ground connection!!

I was wondering if someone could help me find the engine ground connection on the 1995 v6 3.4. I noticed a slight arcing in the engine and tightening this was suggested to me.I would need to know where it was on the engine, and where it connects to the frame, also, what the the heck it looks like in the first place?!?

well the ground for ur battery should only be less than 2 ft away from the battery, normally right beneath the shock tower brace on the passenger side..