Just as the title denotes, there's a brass canister on the back of my fuel injection pump, towards the firewall, ('83 300sd) with a SINGLE vacuum nipple coming off of the top. Unfortunately, I do not know what this part is called, but its pretty self explanitory.

I need to know where a vacuum line that connects to this piece leads to, as the entire vacuum line is gone! I've looked up various diagrams, and I just can't seem to locate one that has this particular piece on it.

Thanks!