In my 2003 QX4, there are 3 different connectors that plugged into the original Bose head unit. Two are used for the radio, called the Metra 70-7550, and were wired to the aftermarket radio that was in my car when I bought it secondhand. The 3rd connector wasn't wired to anything. The steering wheel audio controls don't work with the new head unit, so I bought a PAC SWI-RC to fix this. In the instructions, it says to use the "maxima16a" diagram in the instructions, which is the 3rd mystery connection in my car. Websites like crutchfield only point me to the Metra 70-7550 connectors for wiring harnesses, since the "maxima16a" connector isn't used for normal stereo connections. Is there any resource I can use to find out the name of this connector to buy a wiring harness to make it easier to wire to my SWI-RC? I could just stick the bare wires into the plugs, but that isn't as clean and likely to fall out. Pictures are attached. Thanks
