How to fetch the document names of the attachments on a Journey Checklist task

Summary:

I need to fetch the names of the attached documents on a checklist task, onto my OTBI analysis.

Content (required):

I need to fetch the names of the attached documents on a checklist task, onto my OTBI analysis. Please let me know if this is possible, and if yes then which subject area would contain such a field. I checked in the Workforce Management - Checklists Real Time subject area, but could not find anything relevant. Please see the image attached to see what data I am looking for.

Thanks in advance, for any insight you might be able to provide.