Integrating FB Pixel on Contact Form Button [Avia Layout Builder]

Hi,

I’m trying to setup a new FB campaign, and to make it more accurate, I’ve been trying to add a “on_click” event on a “Submit” button from a Contact Form from Avia Layout.

All I need is to integrate something like this:
<button onClick=”fbq(‘track’, ‘Lead’);”>Button Text</button>
on that button from that pre-made form.

Is there any way to make this happen, or would I have to create a new form from scratch using HTML Code?

Thanks in advance!