I bought the capacitor listed in the link and when I went to install I find my unit has a 3 terminal cap in it. One terminal says Fan, one says HERM, and the other is marked with a C.
What do these labels mean and where should I hook the wires of my new capacitor. 
BTW the fan terminal wire goes to the faan, the Herm wire goes to the compressor, and the C (red)wire goes to the contactor.
Thanks,
John