Step 16: The Start / Select buttons
All of the Game Boy Color's buttons are on rubber pads which, after they make contact with the copper plates on the Game Boy, complete the circuit activating the switch. Our goal is to split it off from the Game Boy so they can come out to BMO's front side.
Start and Select are connected by ground wires and normally you'd have to use the Volt Meter to see which ones are connected. Lucky for you, however, I already marked which are the Signal Pads (those specific to the certain button) and left the Ground Pads (those already connected) unmarked. The only thing you have to do is apply solder to each of the Signal Pads, connect one lead of the Momentary Push Button Switch to each, and connect the other leads to one another. This will complete the circuit and allow us to use the Start and Select buttons on Beemo's front side.
Be sure to add Hot Glue to each of the wires at the end.