Does anyone know what function the red, black and white wires do on the Villex pups ( apart from carry a signal of course

)
I do have the wiring diagrams but I am trying to figure out if these are series/parallel taps or whatever.
I have installed these ( soapbar humbuckers ) in a fretless bass and followed William's advice on reverse taper pots bla bla ( including using his special mid pot he supplies with the pups ) - but I am just not happy with the tone adjustments I am getting.
These are really good quality pups and capable of good tone - I know that so I am not biffing them out.
I am wanting to consider my options of putting an EQ in or looking at other wiring configurations so I need to know the function of these wires.
An email to William has elicited no reply unfortunately which surprises me - I've bought two sets of pups from him
Any light you can shed on this would be great.
Thanks
Mo
Edit - Oh and I have done a search here on this - cannot find anything that provides me the info I am looking for