Hi. im installing an electronic fuel pump in my 89 ram 50. ( 4G63B ). im using the stock carb, and ive already removed the mechanical pump and installed a block plate in the head. i will be installing the pump near the tank, and if someone could help me figure out what to do with the 3 (4?) lines that come off the mechanical fuel pump.

i know one is in from the tank, the other goes to the carb, but there is a smaller line near the top of the diaphragm and a secondary line that goes to the carb. how is this connected?

any help is much appreciated