PC2-36-AMPR Alfa Bose Car Radio Harness Adaptor to RCA’s. Alfa iso Car Radio Harness Adaptor lead. An iso Car Radio Harness Adaptor lead allows you to install a car radio of your choice with out cutting any of the existing car wiring. All Car Radio Harness Adaptor Leads are ISO ended and will plug directly into most models of car radio. The brown socket of PC2-36-AMPR will connect with the black Speaker ISO plug in the picture on the left on the vehicle, the black socket will fit the white plug on the vehicle. The Red Socket on PC2-36-AMPR with then fit the Yellow, Green and Blue connections. See Additional Information for Vehicle Applications. See Additional Information below for Vehicle Applications.