1. Solder to the GBA

Align the ARC GBA board to the GBA motherboard. Solder to the circled pads

Test points are green, red is 5V, black is GND

2. Controlling the board

Hold down [START] [A] and [B] until the leds blink

• [START] changes the colour of start and select
• [UP] changes the colour of the dpad
• [A] changes the colour of A and B
• [B] changes the brightness

After 3 seconds of no activity, the settings will save.

Tactile board edition

The same as above, just solder the extra pin out points. Tactile domes can be removed by just peeling them off