BLOCK BUSTER COMPONENT | SOLDER ---------------------+---------------------- GND | 1 | A | GND GND | 2 | B | GND GND | 3 | C | GND Speaker | 4 | D | Speaker +12V | 5 | E | | 6 | F | | 7 | G | | 8 | H | Service +5V | 9 | I | +5V 1P.Down |10 | J | 1P.Up 2P.Down |11 | K | 2P.Up 2P.Start |12 | L | Counter 1P.Start |13 | M | Coin 1P.Right |14 | N | 1P.Button 1P.Left |15 | O | Red Blue |16 | P | 2P.Right Green |17 | Q | 2P.Left Sync |18 | R | 2P.Button