d50 fuel pump cabureted

on the fuel pump there is 3 outlets. i know 2 are for the gas in and out but witch is witch and whats the 3rd outlet for?

You didn't say what year or engine, but on my '89 2.0L the third line comes from the charcoal canister.

its a 88 and how do i tell what motor i have? shouldnt there be a stamp on there somewhere? and the previous owner has the wrong fuel pump on there cause theres acually 4 outlets but one almost looks like its closed off but theres a tiny hole.

does this look right? i was at picknpull trying to see how everything is suposed to be hooked up and the fuel pump only had the 3 outlets this one has 4.