Change default click button in X.2

Any way to change the default click button in OS X.2?(that is, make the mouse "left-handed") it's hard to find instructions for these old OSs sometimes. 

 
Also, the Mouse panel may not be visible until you plug in a mouse.  Trackpad doesn't count.  Unless you're configuring a trackpad, then click on the Trackpad preference pane.

 
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