If you want to or have to hardwire your stereo heres some help cause I know that I counldnt find any. Remeber always unhook your neg term.

              Wires On the Harness
Ignition-White, White/Black (these will be on the 3pronged male, these are 2 wires and will have to be put together and soldered)

Battery- White/Black(Single wire thicker than the others on this prong)

Ground-I mean comon.

Cincy
Speakers    Wires ON the Harness

Right Rear-Green, Green/Black (these are on the 4prong Green pin)

Left Rear-Grey, Grey/Black

Right Front- White, White/Red (These will be on the Clear 4prong)

Left Front- Blue, Blue/Black

Its really not that hard.

which ones are negative and which are positive?

All with black stripes are your neg, on the wire it self they will have a black line. They will all have a silver or gray stripes in them for some reasons. The Neg will all have the black line running up and down the wires. These pics are of the wires from the Harness taken out of the prongs, these are from the Green 4prong these are the right rear incase you needed to know what the colors looked like if that doesnt answer your question just ask more. Thanks