The link to the solution now seems to be broken, but I would be interested in finding the same information, which hopefully includes not only the wiring schematic but also practical instructions for making the cable (for someone with very little experience).
In fact, I would need Pixy2 information in case the wiring has changed from the Pixy1.
I got a class set of the LEGO version mistakenly believing both Arduino and LEGO cables were included and I now need to make the Arduino cables in order to be able to make full use of the Pixy2.