need electrical print or help

[kuli48]

I bought a used 2001 camry that had been stolen. The radio was missing and where I bought it as is, replaced the radio with the proper radio/cd. I t does not quite work properly. They replaced the cut off pigtail with one that has bigger diameter wires it plugs into the radio fine. There are a couple of wires not hooked up. I need a electrical print and the proper pigtail. The proper pigtail has wires of appx 20 gage vs 18 for the one they used. Can anyone help?

Thanks Mike