1991 Peugeot 309 Diesel (Style)

[el_tel]

I'm trying to hook a new CD player into the above car. Unfortunately, some numpty has pulled off the radio connector, leaving 8 wires dangling. I've identified the 4 speaker wires (2 white, 2 yellow) leaving the following:
fat green/yellow (earth I presume)
fat light blue
fat white
thin green
There's no fat red, which I would have thought would be +ve
Any ideas?
Thanks in advance to any shining knights out there.