Step 4: Prepare and Solder Wiring
I've found the best method is to pre-tin each wire and all the contacts on the controller with some solder then fuse them together with a little heat from your iron. Once you've connected all the wires, connect the controller to a computer and test each input in notepad by touching the end of each wire pair together. When you touch the ends of each pair, a key press should be registered. If not, check you haven't bridged any of the contacts or connected the wiring incorrectly.