Point Wordpress site to pythonanywhere database

I have a wordpress site that I would like to connect to my pythonanywhere database.

Wordpress uses a .php configuration file to manage database credentials that looks like:

// ** MySQL settings ** //
/** The name of the database for WordPress */
define( 'DB_NAME', 'example_database_name' );
/** MySQL database username */
define( 'DB_USER', 'db_username' );
/** MySQL database password */
define( 'DB_PASSWORD', 'not_my_real_pw' );
/** MySQL hostname */
define( 'DB_HOST', '10.X.X.X:3309' );
/** Database Charset to use in creating database tables. */
define( 'DB_CHARSET', 'utf8' );
/** The Database Collate type. Don't change this if in doubt. */
define( 'DB_COLLATE', '' );

I've read the post about external access to the database, but they don't appear to cover this scenario. (Or maybe I missed something)

You will need to use the SSH tunnel. How you would set that up in PHP is not something that we have any expertise in. See and adapt it to your situation.