You didn’t set the password. The database password is not your Client Area password, and can be found by logging into your Client Area, clicking on the hosting account your domain is on, and on “Account Details” click on “Show/Hide” to show the password, then click it to select it all, copy it and paste it in the field. But since it doesn’t work, can you try sql204.byetcluster.com as database host instead, as that points to the correct IP for your database server?
Username and password of your hosting account are on the “Account Details” pane of the hosting account’s management home page for your hosting account in the Client Area if that’s what I understood. After you copied the password, go back to your website and input it in on the “Password” field during OpenCart’s installation.