I didnt know it, but its possible to mount a public owncloud share in linux, which is handy for VMs that I use.
After adding davfs2 (apt install davfs2 -y) the public link can be added by taking the owncloud URL https://DOMAIN/PATH/public.php/webdav and logging in with the share ID as user and password (if used) as password.
mount -t davfs https://www.foo.de/bar/public.php/webdav /mnt/somewhere
I had to add
use_locks 0
to my /etc/davfs2/davfs2.conf in Kali linux, else I wasnt able to add files (re-mount afterwards).