Some Help Please

I have a Peerless 1/2 hp moter which can be wited for 115-230. There is a L1 an L2, an L3, and L4. There is also a C2 and a wire that does not have a label (I am guessing it is C1). I have attached a pic. The red, green, and yellow go to the switch.
Any suggestions?
Thank you in advance
Z

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