Crutchfield says they don't have a wire harness yet for the c1/c2. Please post if anyone finds one that will work. Planning to install an 8310NRB w/h nav and backup camera integration. Power Acoustik makes a very nice license plate holder that has a rear camera and backup sensors, all links right into the head unit. Just waiting on the harness... Thanks in advance if anyone finds one or can cross reference from another Toyota model that that is compatible.