Here's the general database connection information
https://support.smartbear.com/testcomplete/docs/testing-with/working-with-external-data-sources/data...
The online TestComplete documentation doesn't seem to go back as far as your version so I couldn't find anything more specific.
If you are still on Support, you can contact them directly here and ask if they have any more information
https://support.smartbear.com/testcomplete/message
Marsha_R
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