This is the male Bosch/Kärcher C35 adapter for a standard 32mm vacuum hose.
Printorientation doesn't really matter. You should print a couple of spare clips.
Sometimes you need to tweak it a lillte bit by scaling it in x and y by up to +-1,5%
UPDATE 24.06.2023:
I've uploaded a “new” Version of the adapter, where you can fit an additional part to tie down the Endcap, with a cord.
To seal the endcap against the adapter I've used this technique from Cosmas. As a cord I've used 3,2mm PP cord.
The author marked this model as their own original creation.