I've got a 2000 SI, and while doing my swap and I cannot find out where the fitting for a hose on the upper radiator hose outlet on the head goes. Attached is a pic of what exactly it is. Thanks for the noob help.

 

I believe it goes into that inlet where the thermostat housing is. right near bolt 22.

 

It goes to bottom of throttle body, then the throttle body goes to the IACV