I'm sorry to sound crass, but high pass and low pass filters are very basic AC electronics. Nobody could count the number of web sites that currently discuss them. More importantly, why would you ask a bunch of grey haired electrical engineers how to wire up a guitar? It's entirely a subjective thing. So go buy a bunch of capacitors in a range of values, get a handful of alligator clips, and start experimenting. That's the ONLY way to work with musical instruments.
Either that, or go to one of the many websites that cater to owners of offset Fender guitars and see what they might recommend. Honestly, asking here is like asking a knitting club full of old ladies about the latest fashion in athletic footwear.