I'm surprised that you are asking that one here Cody, lol. The PTC heater plate that you are referring to is only needed if you live in a cold climate. What this does is assist in deicing of the carb in cold weather. How it works is that there is a switch/sensor in the bottom of your radiator that is open when cold and closed when hot. When the switch is open it activates a relay (on the PS fender, pic will be enclosed) to send 12V+ from ignition source to the plate. It's a ceramic heater element. When the switch closes up power is disconnected and the heater as well turns off. Haven't you wondered what that PTC fuse was in the fuse box?
The relay in question is the one labeled with a yellow
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I have more info typed over here:
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(if admins don't like me posting links to other forums feel free to delete the link and PM me to let me know. I'm not about stepping on toes, just sharing my knowledge to other enthusiasts.)