In the next step, we’ll show you how to connect your motors. For right
now, take a look at your airframe and find the 4 white marks on both
sides of the edge of your flight control board that you’ll use to line up
your motor connector pins. The red arrows show you where the white
marks are on the flight control board. The dotted line shows you how to
match up the marks on the flight control board and the motor connectors.