The washer fluid container is not being used because its part of the foot operated washer system. Seems like a good idea to re-purpose the container as a coolant recovery container.
I went ahead and cleaned up the washer reservior and installed it to be used as a coolant recovery tank. I connected a vent hose from the radiator to the washer reservior and then filled the reservior about 1/3 with distilled water. I made a mark where the fluid level is to see what the changes will be once I start driving the car.