Personally I would just fit them with the stock wiring and see what it sounds like.
If there's something about the sound that you don't like, come back and talk to us about how you'd like it to change (e.g., brighter, clearer, darker, whatever) and we can give you some advice then. Best thing is to pop the pups in first to give you a baseline. If you want a complete new harness you could ask a tech to build one for you once you've worked out what components you'd like, or you could try doing it yourself if you are good with a soldering iron