E30 rear speaker cable

[Froos]

So my e30 was cabled for rear speakers. Not adding anything fancy just want my recently sourced 1990 blaupunkt to work. So any suggestions on where the rear speaker cables are hidden close to the head unit would be appriciated!

[monty23psk]

cables should be in the dash behind the radio section. If you get the ETM, you can see the color code for each wire segment.