What is the question? You took it apart to remove it...from the dash? "Should have looked up how to remove this light switch"? Do you mean should have looked up how to disassemble or assemble? What do you need from us? How to wire it back up?
http://www.classicchevy.com/assets/illustrations/classicchevy/25-01.jpg


Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn