Where to find munchkin tracking code?

Hello,

Where can I find the munchkin tracking id in our Marketo Instance? I've been sent this article https://developers.marketo.com/javascript-api/lead-tracking/#embedding_the_code which states "Your Marketo instance automatically provides preconfigured tracking code snippets to embed code on your external pages", but the article doesn't say in where in your Marketo instance.

Thanks in advance.