Strange Weather Pack Connector

[ittlfly]

I had my alternator rebuilt and was putting the car back together. I came across a strange 2 wire weather pack connector that I don't know what to do with.

It is on and part of the same wire loom that plugs into the top on the oil sending unit on top of the oil filter housing. it was black wire tied to the side of the sending unit itself as I recall. I can't see where it plugs into anything. It has a grey / black bulbous looking thing that extends down from the weather pack connector itself. I can't see where to plug this weather pack into. Maybe it was never plugged into anything and used for someother purpose??

Thanks for the help