Eddy 1406 elec choke operation-Not "getting it"

There should be a piece of linkage that goes from the butterfly to that stepped cam,.

When the choke closes , it lifts the counter weight/cam so that the fast idle screw engages the diff steps of the cam,.. As the choke comes off ,, the cam slowly drops progressively down the steps, till it totally clears the cam,, then the normal idle speed screw takes over....