Can `backup-keep-time` prune configuration backup in a custom location?

I use this command: sudo gitlab-ctl backup-etc --backup-path <my-custom-location> to backup my configuration

According to Limit backup lifetime for configuration backups (prune old backups), I can use backup-keep-time to prune my old backup.

Can backup-keep-time prune configuration backup in a custom location? Or it only works with default location: /etc/gitlab/config_backup?