How to modify the owl slider for WordPress?

Question

Owl Carousel

Hello. Tell me, please, I need to finalize owl carousel For WordPress.
I need to add a Download button under each element.

I just <button><a href="#">Скачать</button>can’t add - the content manager doesn’t know how and can break it. Need to automate. Maybe add a button to the area in the screenshot so that you can simply drag the button?