I have a 73 240Z restoration project underway. I'm currently trying to install a dash overlay. To do so I have to remove the hazard warning switch knob. It's one of the green pull switches. This may sound stupid, but I can't figure out how to get the knob off. I tried pulling, unscrewing, looking for a set screw, looking for a release button on the back. Nothing. It can't come out the back with the knob on. I'm afraid it I pull any harder I'll break it. Any suggestions?