Catalyst with HTML::FormFu: checkbox with filename and image

In my formular I want to have not only the filenames but also the images above the checkbox. How to put this in a yml file?

- type: Repeatable
  name: scanfile
  elements:
    - type: Checkboxgroup
      name: scanfiles
      auto_id: "%n_%c"
      label: 'Scans:'

Thanks for your help!