Connecting the ESCs is one of the most important tasks in building a quadcopter or any other drone. You can buy four pieces of ESCs or a four-in-one ESC. I suggest you use a four-in-one ESC, which is lighter and easy to use.
If you use single a ESC, connect the wires of the motor to the ESC, as shown in the following figure. The connection of the motor and ESC do not matter because the wires are for changing the phase only:
If you use a four-in-one ESC, the connections are also almost the same. I personally use Multirotor four-in-one ESCs from EMAX. Refer to the following figure to know how to connect the wires:
The 3 x ...
