ford cassette radio m259232/94fp-18k876-fa?

I have this radio to fit into my ford galaxy ,I have the two yellow blocks in the radio , the block with the eight connections is not any problem as that is for the speakers, my problem is with the power in and all of its connections,the colours are as follows yellow and green(thin) black and green(thick) black and green (thin)and three wires orange and black one thick and two thin I need to know which is negative or posative

micky chandler
January 2010