Needing a little advice wiring a Psycho knob, 2 volume pots & a 3way switch ?

So I got a psycho knob to use in my cbg, Id like the Psycho knob to work for both Pickups. However I'm uncertain about the wiring. 

I have 2 pups, 2 volume pots, a 3way switch & the psycho knob.

Can someone tell me where I wire the 3way switch betwee

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