I can narrow it down further if you like.... It either goes to the intake manifold, or the water pump.
I don't have a six cylinder in my car, otherwise I would walk outside (in the rain
), open the hood of my car, locate the heater hose in question, follow it through the maze of wires, hoses and tubing, and find out exactly where that heater hose terminates.
I would do that for you Iryan7, but I cannot. It is up to you to solve the mystery of whether the heater hose connects to the intake manifold, or the water pump. Use any means at your disposal.... A flashlight and a mirror can come in handy sometimes. You may even have to move something out of the way to gain access.... I don't know.
The only thing that I am absolutely positive about is, I am confident that if you go out to your car and set your mind to following that broken hose to wherever it connects to, you will indeed be able to answer your own question without the need of any assistance from the internet, or a repair manual.
Let us know what you find.