What is the difference between DB Connection in DB Manager and DB Connection in Target Database section?

I’m looking for clarity on the difference, if any, between the DB Connection in DB Manager and DB Connection in Target Database section. I am using Docker hosting and NodeJS server type. In both Development and Production I am using MySql outside of the web hosting server. In development I have MySql server running on my desktop and in production I have a Digital Ocean Managed Database.

What I want for Production is for Database Manager to connect to my Production database on it’s public url (this is working) but for the Production Docker server, which is in a VPC, to connect to the database on it’s private URL.

Is this just a case of adding the details of the private access for the database to the Database section in the Production Target?

Thanks
Allan