Realistic brand Cassette deck Wiring
 

I recently got my beast of a car for a bargain price, but it didn't have a stereo, as the previous-previous owners sold it. So, I got an old cassette deck, and I want to hard wire it into my car. Can anyone give me a color coded legend as to what each wire is? I contacted the manufacturer, and apparently they don't keep any of that info on hand. I have the wires in my car figured out (L/R front speakers, L/R Rear speakers, power (always on), power (accessories) and some grounds. If anyone knows, please tell me! I can take a photo later if it would help. Thanks, bye for now!