Dynamic button link urls

Brand new to wordpress and trying to update an existing page that is using the Responsive Slick Slider plugin.

Is there a way to grab a url param from the page the slider is used on and append it on to a url text box box field to pass that parameter on to a link for a button in the slider? I have a tracking parameter that is added when users arrive to my site and I want them to continue to have it as I pass them on to an external site.

Thank you