As you can guess, only your provider has the necessary information.
> I'm not sure what maccarth_moodle is, maybe there is someone out there with that name.
Why have you given maccarth_moodle.afmu.com as your "Host Server" in your screen-shot?
> My database is called rmccarth_moodle. And the domain is onlinelearningpartners.org as you have it at 69.16.201.62.
The most likely answer is
- Server: localhost
- Database: rmccarth_moodle
- User: rmcarth_moodle or just moodle
- Password: wish I'd knew