Connector for a hose with no metal fittings?

And always make sure that a back flow preventer is used, which is probably another reason for the cut off hose.

There are many reasons for not having a connection to a dump station water hose as had been outlined here. Flushing black tanks should be done at home, and if on the road simply seek a full-hookup campsite with water and a dump and do it there. Such an effort can take some time and the next guy in line will be PO'd waiting for you. Yes, you can say you might do it at an unbusy time but Murphy's Law will always come into play.

Just to clarify my question and to ease your concern re the safety of our drinking water - we weren't going to use the "fresh" hose at the dump to refill our fresh tank. We just wanted to make a connection with water from somewhere to flush the black. (and our RV does not have a gravity fill)
Thanks for all your suggestions

Both hoses are intended to be bare-ended for many reasons.
The black water so that you can insert it into the dump hose and piping for proper rinsing. I can't figure why you would want to connect to that hose.
The fresh water is intended for filling through the gravity fill hole. The time is would take to attach a fitting and connect it would add to the fill time would make other campers waiting in line very unhappy.
In addition, in both cases it is a safety feature to protect the facilities and the unit in case some distracted camper drives away without disconnecting.
In you need to fill the fresh water tank through the city water connection, you have to do it at your campground.

Any hardware store, Home Depot, Lowes, etc. has both plastic and brass fittings intended for hose repair or making shorter ones out of longer ones. They shove in, then you tighten a couple screws on a clamp thing, and while they are generally used for permanent installations, they can be removed when you are done, all you need is a screw driver.

Water at the park dump stations where I am now is marked "not potable". I wouldn't use it for anything but rinsing either.

My experience is the hose at the dump station for cleaning and flushing any spills seldom has a connector. But, I agree with the previous poster that I wouldn't want to use either for my potable water since you don't know what a previous user did. I fill my water tanks at the camp site and dump at the dump station.

CG may have intentionally remove hose fittings so that folks don't spend long time at dump station flushing tank.

Also 'potable water' at dump station..........yuck

I am not real particular about water supply sources BUT even I would have reservations about using a hose at a dump station to fill up my fresh water tank with. Way too many chances that hose as been used for other duties, has been laying in waste liquids, stuck down sewer hoses etc.

Water thief. Also there's a "Water Bandit". Available CW, Amazon, etc. Not perfect but works okay in a pinch. Prices vary.