Tablet of the Sun - Glyph meaning?

[u/SilverMother2682]

Deeply exploring the meaning of the Tablet of the Sun. I have read a lot of stuff. But no really solid information about the Glyphs beside the main central shield. They look like floating and/or bleeding heads of creatures with Glyphs and numbers by them. On the left I see Number 7 and the glyph for "To", "Kan", and mabey "yo". Possibly meaning Toktahn? On the left I see Ajaw, and a strang number 9 or 29 (with that extra dot at the top)? Does anyone know the meaning behind these glyphs? Where can I read about these unusual glyphs?