Where is r3 and l3 for the GameCube controller?

In the GameCube controller, there are no dedicated R3 or L3 buttons like those found on other controllers. Instead, the GameCube controller features a Z button located under the right shoulder (R) and a similar L button on the left shoulder. The analog sticks do not have a clickable function for pressing down like R3 or L3; they are used for directional control and movement.