Where does the o2 bung go on a 2000 Civic EX? Would be AWESOME if someone happened to have a picture of where it goes so I can tell the muffler shop where to weld the bung onto it. I was just told that one goes before and one goes after....but where after the cat? Does it matter? A picture is worth a thousand words as they say, that way I know exactly where it goes. Also, how can I get to it. I saw that it went up through a hole in the bottom of the car but couldn't see it through the engine bay. Help would be much appreciated.