For this experiment, the only thing connected to the Arduino is the servo motor.
The servo motor has three leads. The color of the leads varies between servo motors, but the red lead is always 5V and GND will either be black or brown. The other lead is the control lead and this is usually orange or yellow. This control lead is connected to digital pin 9.
The servo is conveniently terminated in a socket into which we can push jumper wires, to link it to the breadboard and then to the Arduino.