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 -
                               | J | 8 |                      
                               | K | 9 |                        
           Speaker (-)         | L | 10|         Speaker (+)
                               | M | 11|
          Video Green          | N | 12|        Video Red
          Video Sync           | P | 13|        Video Blue
(Auto/Man) Service Switch      | R | 14|        Video GND
(Slam)     Tilt Switch         | S | 15|          Test Switch  (Advance)
         Coin Switch # 2       | T | 16|        Coin Switch #1 
           2P  Start           | U | 17|          1P  Start
                               | V | 18|
                               | W | 19|
           2P  Left            | X | 20|          1P  Left
           2P  Right           | Y | 21|          1P  Right
    (Flap) 2P  Button 1        | Z | 22|          1P  Button 1 (Flap)
                               | a | 23|
                               | b | 24|
                               | c | 25|
                               | d | 26|             (HS Reset)
               GND             | e | 27|             GND
               GND             | f | 28|             GND