hello, i am replacing my fuel pump in a 1995 blazer 4wd 4door, dropped the tank there are 2 lines coming out of the sending unit, and above the filler neck and to the left of sending unit there is a plastic fitting very similar if not the same as in front of the tank with a screw in it and a hose above with a screw in it. anyone know what this goes to, i suppose i need more parts than just my pump to fix this. the pump has been replaced before as the hoses were cut and clamped with fittings as the connections are very rusty i assume thats when the screws got installed.

thanks
phil