toyopl

Hey guys, my cousin has is300, I believe 2003 if I'm not mistaken and he has gotten himself new Pioneer radio. When I installed radio for myself on my Scion Xb, I bought this here wire harness http://cgi.ebay.com/SCOSCHE-TA02B-1987-UP-TOYOTA-CAR-STEREO-WIRING-HARNESS-/110659645444?pt=LH_DefaultDomain_0&hash=item19c3d43004 to not cut factory harness to connect wiring, but I'm having hard timee figuring out which harness is for is300 models. Anyone could help me out here.....