Water hose hookup on fresh water tank/black water flush port

I have a question regarding the fresh water attach point on our Winnebago Brave.  When dumping the black/gray water tanks prior to departure, can I switch the fresh water hose to the black water tank flush port, or do I need two separate hoses?

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RV Exterior Spray Port Hook-Up Connector

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How to use the Black Tank Flush on an RV

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A.A Fresh Water Tank Accessory Hose Connection Kit

Whats the etiquette for flushing a black tank with potable water

If you are flushing your black and grey water tanks or cleaning out a tote tank, then you have to use a separate hose so that you don’t risk

Camco 22990 25ft RhinoFLEX 5/8 inch ID Gray/Black Water Tank Clean Out Hose | Ideal for Flushing Black Water, Grey Water or Tote Tanks, Orange

RV Exterior Spray Port Hook-Up Connector - RecPro