The pssenger side of the cylinder head has a square head plug toward the rear that is the point to get hot water from the motor to the heater core...it is between the #4 and #5 cylinders exhaust port. The stock setup uses a long J shaped pipe that threads into the head and spaces the rubber hose away from the head and exhaust manifold...they melt if they are too close...heres an image that shows the stock way:
Lord send your Holy Ghost into our hearts and make the desire of our hearts Your Will.
Pro-choice, that's a LIE, babies don't choose to die!!