There are several fittings, screw posts, and access ports that I'm not sure will serve any purpose when I install new pan sheet metal. Indeed, they are missing from the replacement pans I have. Are they really needed? I suppose some water drain is necessary, even though I live in a very dry climate, and this will be a pleasure car only. I can't imagine when I would need access to the inside of the front bulkhead through the rubber plug...? In retrospect, the drains didn't do a very good job preventing rust!