If you look at the radiator on the pass. side, right in the middle should be like a half inch diameter small fitting that is already attatched to the radiator. That is where the coolant tubes from the bottom of the throttle body go to. If you dont have that small fitting, then dont worry about it, just put small end caps on the throttle body. If you dont have small end caps, then dont worry about it. You really dont have to have radiator fluid passing through the TB at all. I think its only for extreme cold conditions?