Consumer config doesn't seem to work

I have a sink connector which consumes messages from KAFKA, I've configured poll records as 1000 by adding this property.
I just followed the documentation here.

But It always polls 500 messages max, which is default. Am I having correct configs?

Where did you put that config? needs to be in streams.conf now.

When you run CALL streams.configuration.get() YIELD name, value RETURN name, value
You should see your configuration settings.