Unclear how to connect to SAPB1 database

In the AI Studio, on the SAPB1 Integration page, there is no clear way to tell the integration which database it should use or to give it credentials for the said database.

When using Test Sign-In button, it says values like SAP B1 Service Layer Address, database name, username and password are missing and there is no way to add them.

When pushing the “Set” button it gives options: "fixed", "prefilled" or "each user"