Upload A world Using an FTP client
Ensure the server is stopped before uploading the save data
You will want to set up an FTP client to upload the save files from your PC to the server.
https://hosthavoc.com/billing/knowledgebase/9/How-to-use-an-FTP-client-with-your-service.html
The Save Location is .\AbioticFactor\Saved\SaveGames\Server\Worlds\
The Default World name is Cascade, If you are uploading a world folder with a different name to the worlds folder, you can either rename it to be Cascade or edit the world name option in your command line settings in the command line manager.
Example of what the save data looks like when viewed from the file manager