What is this part of my carburetor

See diagram of Asian carburetor two barrel it may be just the way it was cast. or if a single barrel carburetor may be part that goes to compensator for choke. See pictures.

Thanks. It is a two barrel carburetor. That part has a one orifice for the secondary barrel throat. Inside this small chamber, there is a plate like valve. Other end goes to the intake manifold. This part not found in above manuals.

I added some more pictures. It lies in the direction of the arrow in top view.

It has to be a vacuum port for the secondary diaphragm which makes the second throttle plate open if it leaks vacuum it will not work from the pictures an diagrams that have been sent.

Thanks "HMAC300" for continues help.

This carburetor has a secondary throttle diaphragm. It connects to a place, where 90 degrees counter-clockwise to this. (As in the following photo)

as far as I can tell that is what the last reply said is the area you were questioning.

After Googling for long period, I found this as a place for thermostatic valve. Unfortunately that thermostatic valve has been removed by the previous user and added a valve like plate.

Now that valve production is discontinued. So will never able to use this part.

you might find one in a junkyard if you are lucky. Next time please set carburetor as it sits on vehicle for easier id for us.