I don't know if you got answers yet, but typically you find this:
There's a fixed bayonet fitting on the RV; this is the male end, with studs on the outside of the pipe. The hose has a female bayonet fitting (with the rotating collar that has prongs to engage the studs) on the end where it connects to the RV.
The other end of the hose may have no connector at all on it, in which case it gets stuffed down the sewer pipe and the gap maybe sealed with a rubber cone-shaped donut, or it may have a male bayonet fitting. The latter is in my opinion preferable as it allows you to attach another hose if you need more length. With the fitting on the end of the hose, I'd get a specialized elbow with a stepped cone sort of doodad that goes into the sewer connection (and screws firmly into position if the sewer pipe is threaded--otherwise, it just sets in place) and has a female bayonet fitting on the other end.
You can get kits with one or two hoses and the elbow and maybe some other odds and ends like caps for the hoses from lots of places.
If you have holding tanks, there is of course also a valve between the holding tank and the sewer connector on the RV--generally a sliding gate valve. It would probably be wise to install one even without a tank so you don't have all the water drawn out of your drain traps while driving down the road. If you don't have traps in your drains, you most definitely want to install them before hooking up to any sewer connection. It would also not be a bad idea to have a vent pipe going outside to the roof (or at least a high point on the wall) that connects between the drains and the fitting to help prevent the traps from being sucked dry while you're connected up; that part is rather similar house plumbing.
