theres the reset wire going to the board,so if its an L shape boardset it will be located on a molex that connects to the pin connection.cut the reset wire but,cut it long enough and leave it attached to the molex on the game board,stick the other end into a gnd point,there that is reset line gnd'd.
look at the manual and just locate the reset line wire,it will tell you its pin location and color.on my deluxe cocktail its orange.i just use a pin in the cut end and have it stuck in the gnd point on the power connector on the boards (the edge connector)