You mentioned the Automator major version is12.3, but did not specify the minor version. The latest patch update for the Automator 12.3 is 19 (12.3.19). The version is displayed on the bottom right corner of the Automator login page.
The patch updates are cumulative, you can just apply the patch update 19 and it should resolve the database mapping issue.
If you are referring to Datawatch Modeler ODBC connection, please see below.
If you wanted to import data from an ODBC compatible database (in the Open Database dialog ) you would select the ODBC connection option, and then use the Select an ODBC Data Source dialog that displays to select the ODBC data source name (DSN) that connects to your ODBC data source.Modeler can import data from ODBC data sources for which you have established an ODBC Data Source Name definition (referred to as a DSN).
However, Modeler does not create a DSN for you – you must create a DSN using the Windows Control Panel ODBC Data Sources applet or a similar utility.
To configure or setup a DSN in your machine environment, you may check this link for your reference <Creating a Data Source Name (DSN) in Windows>
Hope this helps. Thank you!