Clarification question regarding Fig 1 in paper

[singh-is-singh]

In this figure
https://www.nature.com/articles/s41586-022-05172-4/figures/1
should the elements of u, v and w matrices be actual values of a, b and m; instead of 1, -1 ?

as an example in below image, should (0,0)th element in u matrix be 'a1' as pointed by green arrow in the below image?

if you can clarify this that will be great. Thank you.