CR6-se v4.2.5 mainboard specs

[Jdejong]

Hi,

Is there any documentation about the v4.2.5 mainboard avaiable?
I'm looking for a free 'data' pin on the board, which can be used for the neopixel /led library in the Marlin source....

I see the P9, P8, P7, but do these actually do something? Are these connected, or just slots?

Thank you!