I purchased this bike a year ago and have been restoring it since then. It had the air pods on it and was missing all of the original air filter assembly. I have since purchased all of the original parts and mostly have it reassembled. Currently the vacuum from the carbs and of course the fuel line itself are attached to the petcock. Does anyone know where to attach the breather from the air box? There's a nipple on the top center.

Thanks,
Chris