Anchor Link Click to Open Nav Menu Dropdown?

Hey all – thanks in advance for hints / guidance / help on this issue.

I’ve got a client site with a mega-menu that’s a container nested in a dropdown. The container holds the site’s contact form and has an ID of #contact-mega.

Works great / looks good when it’s opened from the dropdown in the nav… but what I need is to also be able to trigger the drop-down by clicking a link / button I place on any page of the site.

I thought this would be as simple as using an anchor link linked to the ID of the container. I also tried doing an interaction, where clicking on a button shows the element #contact-mega.

No joy. Does anyone have any idea how to make this work?

Thanks in advance,

Matt Selznick