I have a 1972 Challenger that I want to work on ignition switch. I have the Service Manuals and watched videos on disassembly, but they don't show getting the horn button off for access to shaft & nut. There are no screws or clips that I can find to get button off. I saw one video that guy just pulled it off, but I couldn't see enough detail to see if same as mine. I have pulled up but won't come without prying. I don't want to damage it. Can someone tell me how to safely get button off. I've got enough info after that.