Note : an * denotes an inverted line Wiring List for P20: | GND | A | 1 | + 5 return from regulator + 5 V Reg. | B | 2 | + 5 V Reg. | C | 3 | | D | 4 | Audio 1 Out | E | 5 | Audio 2 Out Video Horiz. Sync | F | 6 | Video Vert. Sync Start 2 LED * | H | 7 | Left Fire Button Center Fire Button | J | 8 | Right Fire Button Right Coin Slot * | K | 9 | Left Coin Slot * Video Blue | L | 10| Video Red Video Green | M | 11| Left Coin Counter Center Coin Counter | N | 12| Right Coin Counter Start 1 LED * | P | 13| Start Button 1 * Test Switch | R | 14| Slam Switch Center Coin Slot * | S | 15| Start Button 2 * Vert. Tball Dir. | T | 16| Vert. Tball Clock Horiz. Tball Clock | U | 17| Horiz. Tball Dir. | V | 18| Comp Sync * | W | 19| - 5 V | X | 20| + 12 V + 5 to Controls | Y | 21| + Sense GND to Controls | Z | 22| - Sense Wiring List for P19: (Only used in cocktail version) | | A | 1 | | B | 2 | | C | 3 | Right Fire Button 2 | D | 4 | Center Fire Button 2 | E | 5 | Left Fire Button 2 | F | 6 | Cocktail | H | 7 | | J | 8 | Horiz. Tball Dir. 2 | K | 9 | Vert. Tball Dir. 2 Horiz. Tball Clock 2 | L | 10| Vert. Tball Clock 2 | M | 11|