Working on Max7219 driver. Which one make sense and better? Indexing from left-to-right or right-to-left or it does not matter?

I originally indexed from right to left since the rightmost is the first device connected to the Microcontroller. But in code, i had to reverse whenever i do batched SPI transfer. It add complexity in implementing embedded-graphics;

But if i index from left-to-right, it looks like simplify things. am not sure if i am missing something here

source code:
https://github.com/ImplFerris/max7219-display/blob/main/src/driver/max7219.rs