Solder Side                  |         Parts Side
   ________________________________|___________________________________
                       GND     | A | 1 |     GND  
   ----------------------------|---|---|-------------------------------
               Speaker (-)     | B | 2 |     Speaker (+)        
   ----------------------------|---|---|-------------------------------
          Coin Counter # 1     | C | 3 |     Lockout Solenoid
   ----------------------------|---|---|-------------------------------
                        --     | D | 4 |     --
   ----------------------------|---|---|-------------------------------
                       +12     | E | 5 |     +12
   ----------------------------|---|---|-------------------------------
                        +5     | F | 6 |     +5
   ----------------------------|---|---|-------------------------------
                       GND     | H | 7 |     GND
   ----------------------------|---|---|-------------------------------
               Test Switch     | J | 8 |     Service Switch
   ----------------------------|---|---|-------------------------------
           Coin Switch # 2     | K | 9 |     Coin Switch # 1
   ----------------------------|---|---|-------------------------------
                 2P  Start     | L | 10|     1P  Start
   ----------------------------|---|---|-------------------------------
              2P  Button 1     | M | 11|     1P  Button 1
   ----------------------------|---|---|-------------------------------
                  2P  Left     | N | 12|     1P  Left
   ----------------------------|---|---|-------------------------------
                  2P  Down     | P | 13|     1P  Down
   ----------------------------|---|---|-------------------------------
                 2P  Right     | R | 14|     1P  Right
   ----------------------------|---|---|-------------------------------
                    2P  Up     | S | 15|     1P  Up
   ----------------------------|---|---|-------------------------------
                        --     | T | 16|     --
   ----------------------------|---|---|-------------------------------
                        --     | U | 17|     --
   ----------------------------|---|---|-------------------------------
                        --     | V | 18|     --
   ----------------------------|---|---|-------------------------------
                        --     | W | 19|     --
   ----------------------------|---|---|-------------------------------
                        --     | X | 20|     --
   ----------------------------|---|---|-------------------------------
              *** NOTE!!!!     | Y | 21|     Coin Counter # 2
   ----------------------------|---|---|-------------------------------
                       GND     | Z | 22|     GND  
   --------------------------------------------------------------------

   
On the CPU board there is an additional 3-part connector.  This is power.
It's wired as follows:

            1 - +12v
            2 - GND
            3 - +5v

On the Video board, there is an additional 6-part connector.  This is
the video connector.  It's wired as follows:

            1 - RED
            2 - GREEN
            3 - BLUE
            4 - SYNC
            5 - VIDEO GND
            6 - (Not used)

   

*** NOTE!!! Connect this pin to GND to enable 'table' mode (inverts the screen for player 2). It is useful to connect a 'lamp-type' switch onto this connection to turn it 'on' should you wish to put the game in a cocktail cabinet.