Tech help with the Injustice Fight Stick and applying Uila S Flash LEDs on clear Seimitsus

Hey, everyone, first time attempting to make buttons be in other various LED colors based on which button(s) are pushed, like in this video:



I also stumbled upon this video, too:



However, I am at a loss as which wire connects to what from the Injustice stick to the Sparky PWM PCB and also wanted to know how to change the LED colors. As stated, I have the Uila S Flash LEDs along with clear Seimitsus. I am also wondering what the Sparkfun PCB is for as I also got that along with the Uila S Flash LEDs I bought recently. Any help would be greatly appreciated!