Streaming live at 10am (PST)

Need to add JS to a button

First and foremost, I am a coding noob. So any help is greatly appreciated, I am thankful for a forum such as this one.

Currently, I need to add this script to a button in order to enable cross-domain tracking on a site that connects to a Acuity Scheduling sub-page:

<script src="" async></script>

I am looking to add it to all “Book Now” buttons. Some have different classes than other but once I figure this out I think I’ll be able to apply to each button class.

Thank you to ANYONE who can help.

READ ONLY Link to site: Webflow - Forward Detailing