P20: 44-pin edge connector

        component side        solder side
        --------------        -----------
                   GND  A  1  GND
                   +5V  B  2  +5V
                        C  3  +22 VDC
                        D  4  -22 VDC
              10.3 VDC  E  5
          COIN LOCKOUT  F  6  COIN CTR R
            COIN CTR L  H  7  SELECT LED
             START LED  J  8  ROT L P2
              ROT L P1  K  9  SHIELDS P2
            SHIELDS P1  L 10  THRUST P1
             THRUST P2  M 11  SELECT
                SW GND  N 12  SW GND
                SW GND  P 13  SW GND
               CABINET  R 14  SLAM
              AUX COIN  S 15
             SELF TEST  T 16  COIN L
                COIN R  U 17
                        V 18
                        W 19
                        X 20
                   +5V  Y 21  +SENSE (+5V)
                   GND  Z 22  -SENSE (GND)


P19: 24-pin edge connector

        component side        solder side
        --------------        -----------
                 X OUT  A  1  X GND
                 Y OUT  B  2  Y GND
                        C  3  FIRE P1
                        D  4  FIRE P2
             ROT RT P2  E  5  ROT RT P1
                        F  6  START
               RED GND  H  7  RED
             GREEN GND  J  8  GREEN
              BLUE GND  K  9  BLUE
                        L 10
             AUDIO GND  M 11  AUDIO 2
                        N 12  AUDIO 1