To connect to Zendesk using the OAuth 2.0 client credentials authentication, you need the Zendesk client ID and client secret.
Configure the OAuth endpoint with the client credentials grant type, and then create an authorization integration to get the authorization details.
Use the Identifier value in the Zendesk application as Client ID and the Secret value as Client Secret when you configure a Zendesk connection using OAuth 2.0 client credentials authentication.
For more information about how to create an authorization integration and get the authorization details, see OAuth authentication with your application in the Zendesk documentation.