Circuitmess MAKERbuino Build Manual page 18

Step 6 – two slide switches
Now solder the two slide toggle
switches for turning the console ON and
OFF and muting the sound. They're
soldered at the bottom side of the PCB and
labeled as SWITCH1 & SWITCH2.
Apply the previous pro tip and bend the leads of
the crystal at the back of the board.
Step 5 – two 22pF capacitors
Solder the two 22pF ceramic capacitors (little red-ish
thingies with the number 22 written on them). Along
with the crystal, these are essential for the oscillating
circuit of the game console.