JW, I think Jon is recommending the bottom hole in the container, so that as the engine/cooling system cools, the excess fluid will be pulled back into the radiator. You may accomplish the same thing from the top, if the hose goes all the way to the bottom of the container, as a dip tube. Add a second hole in the top to act as a vent (or leave unsealed. Jon will correct me if I'm off target.
Doug
