My spray port is a bit different - how to winterize it?

Trailer has no outside shower. The spray port on the outside of trailers receives a quick-connect coiled water hose with a nozzle. Just to rinse off objects, pets, etc with cold water. Sorry, can't post pic or link.


So from your answers, I understand that by bypassing the water heater tank, the antifreeze should make it to the outside port, just like it does when I open all the other hot faucets in the trailer. Am I correct?