Help: Dummy installing Crunch Lab 7 and LiquiFire 7

A happy day has come and I will finally equip my Sterling JP70 with the proper pickups in my quest for Petrucci’s Black Clouds & Silver Linings sound. But as much as I’m quite a capable guitar player, I’m not at all a capable guitar user, I have no idea how to change the pickups. Fortunately, a family member is here to help me with the electrics, but it’s the first time for him to deal with an instrument, too.

So far I received such instructions from a Sterling worker: ‘Solder the red and white together, ground the plain and the green to the pickup selector, black goes to the contacts on the selector. It’s the same for each. Be sure to use heat shrink wrapping where necessary. The red and white will be for cool tapping later, so be sure to cut all wires the same length.’

And it pretty much solves most of my problem. But we still need some help.

First, won’t doing the wires the same way for both pickups lead to a phase reverse?

Second, I know that some people place their Crunch Lab with this shiny long side directed towards the bridge, while Petrucci directs it towards the neck. But are there any alternative ways of connecting the cables or is it only a matter of different placement with all the wires exactly the same way?

Third, is there any difference between both LiquiFire sides? They look exactly the same so I’m not even sure if I should think about which side I want to face the neck/bridge.

Thank you for your attention. Please, be meticulous in your answers for electrics is not really something I’m adept in + English is not my first language, so I might not be able to understand brachylogy.

Have a good day you all!