You would use those swipers to send coin pulses to an existing timer. People usually have it set so each swipe is worth a certain amount, like two cash startup cycles, and they have to swipe again for more time. They are also used on single electronic vendors.
i have had cryptopay swipers for i am guessing 6-8 years (before they even came with the gray wires) and just had to replace one 2 weeks ago. i haven’t had any problems at all before that. the gray wires go to #1 & #2 on the led 7. you will only see coin count if you purchase site analytics