Pinout for Ford 2000

Does anyone know the pinout for the connectors on a "Ford Sound 2000" car
radio cassette. I took it from my 1990 Sierra (along with the plugs that
went into the wiring loom) when I broke it up and scrapped it recently and
want to stick it in my campervan, but can't identify the wires. One
connector has eight pins and this is most likely the speakers, the other
connector has 7 wires, two brown wires, one red, grey, yellow and red/white.
I'm tempted to connect the negative from a power supply to the radio chassis
and take a chance on the red being positive, but put you never can be sure
on car stuff. Might be brown?

I've tried all sorts of searches on google, but can't find anything.