Hello! I'm trying to use the 3PL Central source, but it isn't showing up as a connector. Do I need to add it as a source manually? https://docs.airbyte.com/integrations/sources/tplcentral

Yes, because we don’t have credentials to test this connector we didn’t add it to the connector list yet

Thanks. Can you point me to the documentation on how to do this? I'm having trouble finding it.