HRAP V3 Kai PCB help

Hello, I needed some help identifying things that aren't exactly labeled on the PCB. I bought a hitbox style arcade stick, it has a cool little acrylic case. But it came with one of those zero delay encoders, that shows up as a generic chinese controller on pc. The guy i picjed it up from also included an HRAP V3 Kai pcb, which is what I plan on using for the time being. most of the stuff is labeled, but i need help with the directions, usb and home button. here are a few pictures.









i mostly play on pc, but I would like to be able to play SFV on PS4 every now and then as well as cleaning up the wiring inside.

tl;dr: need pinout for HRAP V3 Kai pcb, for use in hitbox stle controller

thanks in advance.