What is the lable for the yaw axis

I have a Logitech 'Extreme 3D Pro' joystick. I am trying to get the joystick rotation to turn the FPSController left and right.

Unfortunately all labels I have found for the device simply call the rotation axis the 'Yaw' while the unity input controller only has numbered axis and x and y as input options. So in my case I want to rewrite the standard 'Mouse Y' to accept the joystick's 'Yaw' as its axis input.

What value do I put in this box?

I am very bad with computers, have no experience coding, and am not developing a full game. I am doing this for an architectural rendering thing for a class.