Custom-GA-Tracking.php

<?php // Use only if required. 

if ( ! function_exists( 'my_custom_event_function' ) ) {
    function my_custom_event_function() {
        wc_google_analytics_pro()->get_integration()->custom_event( 'onBannerClick', array( 
                'hitType' 	 => 'event', 
   		'eventCategory'  => 'Outbound Link', 
   		'eventAction'    => 'click',
		'eventLabel'     => 'Shopping-Banner',
		'eventValue'     => null,
        ) );
    }

    add_action( 'wp_head', 'my_custom_event_function' );
}