Walk Behind Lawn Mowers

I just purchased a HU725AWD mower. I can't tell whether this model has the water hose washout feature. There's a steel nipple on the rear left hand side of the deck, but no threaded hose connection. Is there a part that connects a garden hose coupling to this nipple? If so what's the part number. I purchased this as a demo model at Lowes, and it's possible the part is missing. THANKS.