Real-Time Backup Server - URL

Just a quick one, I’m setting up a real-time backup server, and the documentation makes no note of the ports.

Should the seafile.conf tile entry include the :8000 port? the :8082 port?? neither?

Example from the doco at --> https://manual.seafile.com/deploy_pro/real_time_backup.html

[backup]
backup_url = http://backup-server

Heading to the backup site tomorrow to implement this, but wanting to check first.
Thanks