custom class on .modal and not on button

Hi. Great plugin. What I’m really missing at the moment is the possibility to add custom class to the actual modal and not it’s button, maybe even data attributes. Right now the “data” and “xclass” get added to the button, which is useful, but I also need to be able to customise the actual modal.

Also is there a way to access the generated id for the modal?

https://www.ads-software.com/plugins/bootstrap-3-shortcodes/