Killing the hum

I recently bought a MIM Fender jazz and a set of replacement Dimarzio Model J PUPs for it. I was thinking about shielding the pickup and control cavities but since the model js are humbuckers, and in the interest of saving time and effort, is it really necessary to shield it to kill the hum?

 

Also, I just want these to wire them to run their standard fashion. That's probably not the correct way to say that but do I need to tell the install guy series or parallel? I'm not interested in setting them up to switch between the two modes at this time. Thanks.

 

On the Dimarzio pickup instructions it says parallel wiring will have less output but with clearer highs and a cleaner sound. It also says the standard wiring for most humbuckers is series. Is parallel the way to go?

 

I think I will go series.