v1.8.5 and aboves provides you with utility to automatically import cPanel accounts to CyberPanel. To use this feature you need to download/upload backups to your server in any location such as /home/backup.
Once backups are downloaded execute this command to restore them:
python /usr/local/CyberCP/plogical/cPanelImporter.py --path /path/to/files
This is not the path of a certain backup file, it is a path of folder which contain cPanel .tar.gz files. All cPanel backups files will be restored found in the given path.