Call popup without class

Hello,

This might sound a bit weird. Is there a work around by which I can omit the class ref in the link attribute but still be able to call & show the popup? Actually I’m trying to use a 3rd party widget which comes with a CTA button. I wish to call the popup when someone clicks the button. Problem is, the widget only lets me mention 1 link for the button but not the class.

Thanks,
Ramnath