Step 26: Using the Original Controller Board
To use the original controller boards, you need to cut off the board sections, then solder wires to them.
You need to cut off the A/B buttons section, the Start/Select section, and the D-Pad section.
Using your X-Acto knife, score the spots shown in the picture.
Use your needle-nosed pliers to break off each section of the boards.
Scrape the light green traces off so you can see the copper underneath. Solder your wires to these. You basically want to extend the controller board sections.