I just finished up my non-nav conversion and started on installing the new head unit. The setup I ordered from Crutchfield came with the Axxess TYTO-01 Wiring Interface, which I've read that other people are having success with. However, when I try to connect the wiring interface to the OEM harness, the pins in the interface are too big for the OEM harness end. It's hot and I'm a bit tired...but what am I doing wrong? Or is the wiring interface wrong?