Clever Document Links supports two Authentication Types for SharePoint: Basic and Client Credential.
It is strongly recommended that Client Credential is used, however the option of Basic authentication can be used for On-Premise installations.
For both types the SharePoint URL and Library Name are the same. In the case of Basic Authentication Type only Username and Password needs to be set.
In the case of Client Credential Authentication Type you need to specify the Tenant ID, Client ID and Client Secret data.
For more information see: