Jasny multiple file upload with other form elements

I try to use Jasny fileupload to pass multiple files to php inside of a form, which on submit event should be uploaded via ajax posted datas. But I can't get it to work. I can not append jasny uploads to posted datas.

If there is a better workaround what would be better to implement instead jasny I would like to know about.

I init my upload fields as follows

jQuery('.fileupload').fileupload({});

I try to catch theme on submit

wizard.on("submit", function(wizard) {
    jQuery.ajax({
      //here When I serialize the form I do not get the files
    });
});