Previously in Kuali Protocols the Admin Attachments option was available where attachments could be added to the protocol. These attachments aren't associated with a specific protocol version but rather the protocol as a whole. Now we've also added the ability to add Notes in this area with the newly named Admin Notes & Files option.
The newly named area is a place where notes and/or attachments can be housed with the protocol via the Admin Notes & Files link in the Actions section available to the Admins. Upon clicking +Add you can add a Note and also an Attachment as desired.
More information on this functionality can be found in the Admin Notes & Files article.