How to add images to [[Appendix:Unicode/CJK_Strokes]]?

I was hoping to add some images to the Appendix:Unicode/CJK_Strokes page. A few of the entries are currently illustrated with highlighted strokes of 永, but I've created images that highlight all the strokes with the examples listed in the Unicode block chart. But I see the page is built with "invoke:character list". I poked around a bit and couldn't figure out what I should be editing to replace the 永-images on the list.

Kephir hasn't been active here for the last few years. This is the kind of thing to post at the Grease pit.