The bleed screw in the red circle. I don't have a better picture.

The water pump is down where the arrow points.

 

Wow! That's some nice intercooler/intake plumbing.
I wish they came from the factory that way. You can actually see the other parts.
So is the hose directly below the intake manifold in the picture the one to put coolant into?
I tried following the line from the radiator under my hood to see where it went, but it got lost under my gigantic stock air filter box. It looked like it came out around there though.

 

You put the coolant into the tank with the bleed screw open. When the water comes out of the bleed screw close it and run the car. Once running you open the bleed screw again until water comes out.

 

I'll try it again this weekend.
I found my bleed screw. It's well hidden under the turbo->intercooler piping, but now that I know where it is, I can get to it with a wrench.
Thanks for all the help Joe.