les elliott

hi, I'm using a flat slide mikuni from tdr 125 for another bike, and cannot be sure which pipe connector on the carb is the oil feed. there is a small nozzle near the rear of the carb next to the intake, that I thought might be an air bleed, but it could be the oil feed. I cannot see any other connection that could be it. does the oil feed on the tdr engine enter the crankcase someplace else?? any help appreciated. cheers les