Multistep form with slider - need individual next/previous buttons

Hi,
I am relatively new to Webflow and am working on a fake insurance site. What I need is to have a multistep quote form (I have created it with a slider) with previous and next buttons that have individual IDs (meaning Next button on slide 1 would have id=“next_1”, and the Next button on slide 2 would have id=“next_2” etc. The purpose is to know which button was clicked so we could tell where in the sign up process the user abandoned. I have been reading the forums and found one post where there was a specific url but I just want to advance to the next slide.
Any help would be appreciated.
I am also having an issue where I see the button in designer - but when I preview the site it isn’t visible.
Here is a link to the read only site - thanks again

Loryn