That's so funny! I'm working on a different level of this series and I've got the same contents issue! I'm still playing with ideas for this. My current plan is to use an icon and handle it like the rules for colored boxes. Put the icon on the opening box line. Of course, a transcriber's note will need to explain what is happening. Here's my thought on the TN (still a work in progress): In the contents, there are items enclosed in boxes that are to be compared. In braille, the box is included with an icon (edco) on the opening box line. A space follows the icon.
If you come up with a better plan, let me know 🙂
Cindi