As described here that you can have multiple attachments in Nintex Forms for Lists. One of them should be the Default Control.
I have designed a form with three Attachment Controls for my List. I want to know which file attachment is connected to my first Attachment Control, which file attachment is connected to second and third attachment control. I want to get them via CMOS. Is there way find it out? Do you save the relationship between between file attachment and Nintex attachment control in SharePoint?
Your quick response in this regard will be highly appreciated.