You can add tabs to the accordion by copying the tabs that are already there and just incrementing the ID ( "ac-1", "ac-2", "ac-3", etc.). The part that you'll need to duplicate is the divs located within the section that has a class of "ac-container"; keep the new content before the end of that section, or it won't be included.
It could be so easy
just had one end-div to much in the code. Thank you!