resistor for 12" fan kit

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I hope someone can help me with information for 12" fan Kit. I was given a 12" fan from a kit so I went on the internet to find instructions to install it. The instruction show a resistor mounted on a small aluminum plate for a heat sink and a three position switch so you can have a high and low speed setting. I can't find any specific on the resistor or the switch. I think the fan is from a Nivel parts kit. Anyone have any information or suggestions? I have an 05 Club Car gas.