66 barracuda formula s tach HELP

Remove the two Phillip head screws to bring down the can, remove the electronic board from the can, cut the wires close to the board as possible, remove the old board. New board marked for the new wires slide each wire into the allotted holes and solder in from both sides of board.and put it back in the can, Re plug in tach wires to dash remount as it's the ground. And your back in tach'