These are all displayed for you directly in the Left and Right panels
Generic (testing purposes only) DSN and HyperFiles require you to also create a SYSTEM DSN on your computer and "link" this DSN in DMC.
NOTE à The HF DSN NAME must contain either HF_ or _HF for DMC to "recognize" them.
All SQL server's (or Access and Excel) require you to define connection strings.
They will be displayed ONLY WHEN the relevant DRIVER is installed on your computer which means some connections CAN exist and NOT be displayed.