couple of intake manifold/cooling questions

[tak2099]

First off, there is a little barb fitting on the intake manifold, where it meets the head. Where did that originally go to? Also there is another metal coolant line running from the bigger metal line that runs behind the engine. What did the hose go to that would have gone on that metal line? And, did the Iacv and the throttle body have coolant running through them?