I'm reading their website on the installation. I've understood most of it.

Except...I have to tap into one of these connectors to wire in my resistors. Is this connector an unused connector after the stock headunit is replaced?

 

elaborate. what unit are you wiring in?

 

i have an 08 350z with 'Premium Bose' cd changer that I'm replacing the headunit with a Pioneer avic-f90bt. I'm also replacing the factory speakers, run all new wires for my speakers and running new amps.

I'm using this PAC unit to retain the steering wheel control. This wiring is for the steering control.

 

I have the f900bt and pac swi-ps in my nismo which did not have bose. On my non-bose there was a brown connector coming out of the back of the stock stereo that was for the steering wheel controls (the one in the illustration you provided). You have to use the wires from that connector for it to work. In other words use the connector or its wires at least lol.