I'm giving serious consideration to installing a Kenwood DNX5120 in-dash navigation system. I've done a lot of research and am getting comfortable with attempting the install myself. The one thing that's freaking me out though is that I have no clue how to connect the PAC-Audio SWI-JACK interface, which is needed to maintain steering wheel audio controls. The instructions and application guides on PAC's website have me going in circles. I'm pretty sure I need to connect the green wire on the SWI-JACK to a 27-pin harness in the Acadia as shown in the vehicle specific application guide. I have no clue where this wiring harness is located though. Also not sure where to connect the power and ground lines for the unit. Any experienced installers out there that can offer some help?