Carb Vacuum Hoses

The bike in question is a 1981 KZ1000M1(US Model). I have noticed while doing another repair that my #3 carb has a single rubber stopper over top of the vacuum part.My #1 and #4 carbs have a vacuum hose into a 3 way which leads to the vacuum switch valve(correct according to manual) and the #2 carb has the vacuum hose connected to the fuel tap(correct according to manual) but it does not say if #3 carb is attached to nowhere. Thanks if someone can tell me if this is correct for #3 carb. Thanks BIGD

1981 KZ1000M1
Toronto, Ontario Canada

The #3 vacuum cap is correct. #2 to the petcock and the #1 & #4 are tied and go to the vacuum actuated switch that opens your reed valves on the valve cover.

Thank You. BIGD