Buy all your Marco Polo Accessories at the Club Shop Visit Shop
ThanksIf you search “shower connection” on this forum you will find quite a lot on the shower which is an extra.
You can buy on the internet from Mercedes.de.
There are others in the Club Shop - hurry I just looked and they only had one left!.
Alteratively you can purchase the snap connector and make one with a flexible bidet/bath hose. There are posts on this if you follow the search.