Solder Side            |             Parts Side
               GND             | A | 1 |             GND
               GND             | B | 2 |             GND
               +5              | C | 3 |             +5
               +5              | D | 4 |             +5
               -5              | E | 5 |             -5
               +12             | F | 6 |             +12
             - KEY -           | H | 7 |           - KEY -
        Coin Counter # 2       | J | 8 |      Coin Counter # 1
       Lock Out Coil # 2       | K | 9 |     Lock Out Coin # 2
           Speaker (-)         | L | 10|         Speaker (+)
                               | M | 11|
          Video Green          | N | 12|        Video Red
          Video Sync           | P | 13|        Video Blue
         Service Switch        | R | 14|        Video GND
           Tilt Switch         | S | 15|          Test Switch
         Coin Switch # 2       | T | 16|        Coin Switch # 1
           2P  Start           | U | 17|          1P  Start
           2P  Up              | V | 18|          1P  Up
           2P  Down            | W | 19|          1P  Down
           2P  Left            | X | 20|          1P  Left
           2P  Right           | Y | 21|          1P  Right
           2P  Button 1        | Z | 22|          1P  Button 1
           2P  Button 2        | a | 23|          1P  Button 2
           2P  Button 3        | b | 24|          1P  Button 3
                               | c | 25|
                               | d | 26|
               GND             | e | 27|             GND
               GND             | f | 28|             GND