Welcome to the forum and congrats on the new 370z. You have joined one of the arguably, best car communities in the world.
At Z1, we offer an installation kit with wiring harness, instructions, diagram etc for around $18 without the fog light. The installation is simple and can generally be completed within an hour or so.
Check out our kit and JDM fog light here:
Z1 Motorsports JDM Reverse Fog Light and JDM Reverse Fog Light Installation Kit
The switchable harnesses will run you around $100+. Our kit is much more afforable and does not require a massive amount of time and removal of interior panels.
Again WELCOME!