P20: 44-pin edge connector

        component side        solder side
        --------------        -----------
                   GND  A  1  GND
                   +5V  B  2  +5V
                        C  3  +12V
                        D  4  -5V
              P1 START  E  5  P2 START
              COIN AUX  F  6  RIGHT
                  LEFT  H  7  UP
                  DOWN  J  8  KICK
                        K  9  
                        L 10
                        M 11  
                        N 12  
                        P 13
                        R 14  
                        S 15
                        T 16  SELF TEST
                        U 17 
                COIN L  V 18  COIN R
               SPEAKER  W 19  GND
            COIN CTR L  X 20  COIN CNTR R
                        Y 21  +SENSE 
                   GND  Z 22  -SENSE 


P19: 24-pin edge connectoor

        component side        solder side
        --------------        -----------
             VIDEO GND  A  1  
                   RED  B  2  
                 GREEN  C  3  
                  BLUE  D  4  
                        E  5  
             COMP SYNC  F  6
                V SYNC  H  7  
                        J  8  
                H SYNC  K  9  
                        L 10
                        M 11  
                        N 12