What are the proper fuel line routings for a 1973 Yamaha RD350 Their are two outlets at the fuel shutoff valve and 2 more off the tankwhere do these go to?

On my 1976 RD400, the two at the shutoff valve go to the carburetors. The two on the tank are connected by a piece of fuel line to allow gas to get from one side of the tank to the other, to get past the frame "hump" in the tank.