You need a volt/ohm meter and some wire markers. get someone to help identify the other ends while you test.

P.S. you'll find the answers in the car, not on the internet.

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Alpine CDA-9887, TUA-T500HD, CHA-S634, CHA-1204 & KCA-410C
Pioneer TS-A6981, 6 x GM-5100T
Kicker 2 x CVR15,
MBQ RCE-216
PG MX2
Soundgate LanStar1
PAC SWI-ALP