THE PIT ------- PARTS SIDE SOLDER SIDE ----------- +5V | A | 1 | +5V +5V | B | 2 | +5V +12V | C | 3 | +12V -SPEAKER | D | 4 | +SPEAKER | E | 5 | C. SYNC KEY | F | 6 | KEY GREEN | H | 7 | RED BLUE | L | 8 | VIDEO GND | K | 9 | COIN | L | 10 | START 2 | M | 11 | | N | 12 | START 1 | P | 13 | UP | R | 14 | LEFT | S | 15 | DOWN | T | 16 | RIGHT | U | 17 | FIRE | V | 18 | | W | 19 | | X | 20 | GND | Y | 21 | GND GND | Z | 22 | GND -----------