Terminal "A" is the upper right pin on the ALDL, "F" is the upper left. The way it will work is if the switch is off, the converter will lock from the computer signal. If the switch is on, it will lock the converter (in 2nd, 3rd,and 4th), bypassing the computer command. The transmission is designed so you can't lock the converter in 1st regardless of the computer command or switch position.