He turns on what's referred to as the "Time Circuits" which is a multicolored LED panel of clocks in link a three-row configuration. One row reads the time where you link are another the time where you've just been and the last the time where you're going.The present time reads 122 AM on this gauge keeping the real-time party going. Lastly Doc shows Marty the very thing that makes link time travel possible The flux capacitor a series of circuits affixed to the rear of the car's cabin.