help with speaker wiring

hi everyone. i had someone steal my radio and wiring harness. i was able to find one in the junkyard but now i don't know which wires on one side go with the other:

i have the premium sounds wires which are labeled: white, purple, gray and green.

on the plug side near the radio i have 8 wires but don't know which goes with what. i have tried to mix and match and several of them work which has me perplexed. i am hoping someone can tell me how these are supposed to be wired up. Thanks!
 
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