Side bar references middle of list

I looked over the rules for sidebars, but I didn't see anything about sidebars and lists. I have a side bar that I want to include before the relevant line - except that's in the middle of a list. And if I put it before the entire list, I have a box immediately following a cell-5 heading which pertains to information besides the box. (That's an entirely separate can of worms lol.) Based on Braille Formats 12.3.1g, I'm thinking I would want to put the box between B and C.

12.3.1g. When a sidebar is necessary for the understanding of a particular text, insert that sidebar before the related text.

Any advice on side bars referencing multi-level lists?