Contact Form 7 – Deprecated on_sent_ok

Hello,
Having trouble.

Contact Form 7 | Additional Settings

on_sent_ok: “location.replace(‘https://toysforkidsbrevard.org/register/thank-you/’);”

Takayuki’s site provides features.php addition, but it’s for GA:
https://contactform7.com/2017/06/07/on-sent-ok-is-deprecated/

add_action( 'wp_footer', 'mycustom_wp_footer' );
 
function mycustom_wp_footer() {
?>
<script type="text/javascript">
document.addEventListener( 'wpcf7mailsent', function( event ) {
    ga( 'send', 'event', 'Contact Form', 'submit' );
}, false );
</script>
<?php
}

Help a designer update this site, that gives Toy for Kids this Holiday season. ??

Thank you
-e

The page I need help with: [log in to see the link]