Just a thought…
Would it be useful to add a custom results field that the Field Type=URL (Field Type and set this to a mandatory field? You could then create a local folder for staff to store the screenshots on and reference it directly in this field. This would require users to copy screenshots to a specified location and update the URL field. However, Greenshot.org is a useful screenshot tool that can be configured to store to a set folder, with a unique name, and structure as well as copy file path to clipboard at the same time for allowing users to paste into the URL field.
I have used the customised results field in different organisations to add to the built in functionality with much success.
I hope this makes sense and maybe provides an interim solution.
PS. I have no affiliation to Greenshot.org but have used it across several different organisations.