IMPORTANT: Connecting to pins 1 and 2 on the big white connector (J22) on the machine's board is a 2-pin Molex connector. Ensure that this 2-pin connector is plugged into the mating 2-pin connector coming off of the square Molex connector from the previous step (you will need to unplug the mating connector if its presently connected elsewhere)
In other words, the start relay on the reader-side ultimately needs to connect to J22-2-1 and J22-2-2: