Here is a reference to the structure of this. Basically, your href for the button will have a # followed by the id you set.
Whatever section you want to scroll to open click, add an id to it.
I will need more information from you in order to tell you exactly what to do. I think it would be best for me to request access to your store, make the changes, and then publish the solution here in the forums. Since Vantage is a paid theme, I do not have access to Edit Code so I'd be shooting in the dark. Can you please provide me with a link to your store so I can shoot you an invite? Also, please tell me which button in your slideshow you want to anchor scroll. I will also need to know the section of which you want the button to scroll to.