I have Craftsman 17" Weedwacker and need fuel lines

Hey jncsurf, I had to buy fuel lines last week. I called the local sears parts store, and gave them the model number. They had a rather generic bag with the correct diameter lines. Just cut to the approximate length.
But now I have a problem: I didn't note which lines went where when I pulled the lines off. Could you tell me where does the line from the primer bulb go: top or bottom barb on the carb? Thanx.