Thread: coolant line questions

So I'm starting to button up some of the coolant lines and vac lines on my setup. det highport.
Im not 100% sure where these lines go any insight is appreciated.

1- hardline coming off gti-r t28 (I believe it's the return line) it makes a 90 turn and goes under the distributor towards the fire wall
2- throttlebody coolant line. The side closer to the firewall, Not sure where it runs too?
3-theres a little nipple right behind the thermostat housing on the coolant pipe right under the distributor. Not sure?
4-the big fitting described as the iacv breather/idle breather in vadim's vacuum hose diagram. This needs to be plumbed back into the pressurized side of the intake system?
5-nipple for charcoal canister on intake mani. I've deleted my charcoal canister so I assume this can be capped off or better yet use it as the source for my bpv/wastegate

If pics will help with any of my descriptions I can certainly get some. Once again any insight is greatly appreciated. Thanks Dave

1: Im pretty certain this is connected to #3
2: I believe this is connected to the water manifold under the intake (but you can delete the coolant running through the throttle if it makes things easier)
3: See #1
4: Pic needed
5: Cap off, not needed.

Thanks for the reply.
in the link below theres a pic for #4 labeled iacv breather/idle breather

http://www.sr20-forum.com/information-library/15944-avenir-bluebird-vacuum-hose-diagram.html