Still swapping carb. Moto 2100 pcv question

[absolutemoon]

Does anyone know where to hook up the pcv vacuum? There are two avail ports on this carb. One goes to the dist vacuum. That leaves one avail port and the is connected to the choke housing. This seem right? It has threads, that's what's confusing me. Here's a pic

 

[superj]

that is for the old school well heating that was used on factory carbs to control the choke. if you swapped to an electric choke then you won;t use that threaded port.

the pcv should go to a large on that feeds below the throttle plates.