MySQL Port configuration?

I am using a PHP, MySQL, Apache, phpAdmin package called MAMP for
the macintosh (os x).
My Apache web server is set up to serve pages from port 8888
And the MySQL db are setup to connect on port 9999.
I editied my wp-config.php file to read…
define(‘DB_HOST’, ‘localhost:8888’);
Is there a configuration setting that I can specify
a different MySQL Port on?
Thanks for any info.