From a couple threads down...
Originally posted by MeanGreen2:
Remove the splash-shield...it's right under the lower radiator hose, facing towards the back of the car. You'll probably need a good stubby flat-bladed screwdriver.
All it looks like is a round stubby ~1 Inch long, sticking out of the bottom right (when looking from rear) plug. I needed alot of force to turn it. Where are you putting the Tee-Flush? 
