Taking a look at the above photo the acquire off going straight down on all four ITBs will be the outlet from the small hole just through the throttleplate (on my ITBs there's no vacuum there - i.e. useless) iirc the throttle opener is applied together with the ISCV as https://israeldsdlr.tblogz.com/getting-my-4age-engine-for-sale-to-work-48090498