Unique form redirect after submit

“The simplest way is utilizing Contact Form 7’s custom DOM event to run JavaScript. The following is an example of script that redirects you to another URL when the wpcf7mailsent event occurs:

<script>
document.addEventListener( ‘wpcf7mailsent’, function( event ) {
location = ‘http://example.com/&#8217;;
}, false );
</script>
Embed this snippet into your theme’s template file. Obviously, you need to replace the http://example.com/ in the code to the URL you want to redirect to.”

Everything is clear to me here BUT how do I apply this on specific form and not on all forms?