Another perspective is "Montage_to_DX_Alg.zip" attachment in https://www.yamahasynth.com/forum/on-the-fmx-side-of-things/latest

There are cases where multiple Montage algorithms fit the DX7. I suppose a more complete chart may show the various options available. My mapping was to try to reduce the variation of mapping from DX7 to Montage operator numbering.

One benefit of the text file (Montage_To_DX7_Alg.txt) is that I spell out both which operators to change level=0 in order to "map out" those operators as well as how to translate the operator numbering from the DX7 to the Montage. I also group them "Mapping A", "Mapping B", etc - in order to show which are related in terms of operator translations.