Endorphin 6hp polarity directions

Hey, new to modular and don't want to install my new Endorphin 6hp units wrong but the manual is confusing: http://endorphin.es/assets/es_milky_way_200106.pdf

It shows the red/brown as -12v on the left but the -12v bus board connection on the right. Is this just a bad illustration or am I reading it wrong?

Thanks.

The ribbon is inverted in the manual (holes are facing the reader) but if you look at the connector groove it's clear that the brown cable goes to the right where is the -12V / red stripe polarity marking.