pipesmell

I have an older jacobsen snow-burst that has a small fuel line that tees off of the main fuel line. I dont know where this is supposed to connect to.  The carb has in addition to the main fuel intke, two smaller ports for fuel line.  There are also two small ports coming off of the engine for fuel lines.  This unit has no primer bulb, I am assuming that all of these ports are a sort of built in priming system.  I just need to know where to hook all of these lines to and from.  Thanks, Jim