Dynamics 2013 to Business Central 365

We a currently planing to migrate Dynamics 2013 to Business Central 365 (Cloud Only). 

We already use O365 services like Teams, so AAD Connect (Synchronized Identity) is in place.

Now we need to integrate Business Central 365 for our On-Prem users.

Our Dynamics consultant needs and ID to integrate Dynamics - I believe that is the Application ID URI which we receive when creating the enterprise app in Azure - hope I am right so far.

I found this documentation, but this is for Business Central On-Prem, right?

https://docs.microsoft.com/en-us/dynamics365/business-central/dev-itpro/administration/authenticating-users-with-azure-active-directory

When creating an enterprise application, what Redirect URI do I have to configure for Business Central 365? Or is this the URI of our current On-Prem Dynamics?

Is there a different guide?

Thanks guys!