You can install any FUSE client available in the standard repository of almost all Linux distributions, or download it from git — for example, s3fs.
Mounting example:
s3fs backup1c /backup1c -o passwd_file=/etc/.passwd-s3fs -o url=https://storage-eu.eudc.cloud -o use_path_request_style -o uid=99 -o gid=99 -o umask=000 -o allow_other -o use_cache=/tmp
If you have any questions, please contact technical support at: mailto:support@host-telecom.com