Hi Baz
I suspect that the (stereo) wires that are in pairs...aka the grey/grey with trace; the white/white with trace; yada yada are the speaker wires (4 channel). Probably one of the wires is an aerial earth..it supplies earth to make electric aerials go up/dwn and maybe the other 4 wires (yel/Or & 2 blue) are pre-amp RAC outs?? Only guessing on that and more than likely wrong as they are not coax wires.
Red for pwr & black for earth...other than that????
As for the car wires...best if your trace them & measure them for pwr & earth. You cannot sometimes rely on the car wires as they can be known to change coulours when they route thru connectors...so the only way is visual & measurement.
It looks as if the car wires are for a 2 channel speaker system where the radio is a 4 channel system.
Maybe you might find something
here or from clarion
here. Maybe type in your radio model number in the Clarion site.
Good luck