Speaker Wires

[The Lone Ranger]

Hi All. My better half has just bought RAV4 3dr Auto and is dead chufed with it. As it came with a cheap nasty R/C player she asked me if I would put CD/rad from her old car in it for her. No prob I thought until I took the old unit out and found a right snakes nest of wires from where someone has butchered the harness. The speaker connector block has only 4 wires going into it therefore only 2 rear Speakers are working. and try as I might none of the wires coming out of the harness seem to be the other 4 for the front So I am thinking of connecting to the speaker wires through the harness that comes out through the doors so can anyone out there tell me which coloured wires are the ones I am looking for. Any help greatly appreciated.

Thanks.