Preparing for the winter car GAZ-66

The nights are getting colder, winter is coming. Today poured water from the GAZ-66. Did not find a tap on the radiator. Flattery under the car did not want to. He opened two bronze faucets on the engine. Water glass in 5 minutes. Got a question. The engine is slightly angled, as seen in the photo. I wonder if all the water came out of the cooling system …