You don't have a shower curtain? Does that mean that you also do not have the little wheeled hooks that hang from the overhead track? Is the track still in place, or was that removed?
The OEM curtain had little slits at the top, and the slits pulled over the little hooks. This is clearly detailed in Commodor47's first picture, if you zoom in. If you want to restore the OEM configuration - and the replies above show that there are lots of other methods - I believe you can buy the little hooks and the special curtain that hangs from them. These are specifically for RVs, so don't expect to find them at WalMart or BB&B.
For example, here are the hooks at Amazon
https://www.amazon.com/RV-Designer-A...s%2C252&sr=8-4
Again, if you want to go OEM, I'm thinking that you could get the curtain and the hooks from the factory. A quick phone call would tell you.
Incidentally, here is what I did for a shower head hanger. Not too different from other solutions. I can't figure out why the factory keeps installing the hook down at faucet level.
https://www.trailmanorowners.com/for...&pictureid=449
Bill