How/where rear speakers wiring

[Konstantin@NL]

Hi,

I was hoping to add speakers to the rear shelf. I have vires there. I was hoping for plug'n'play but turned out those wires are not connected to the head unit (Kenwood). However I am confused since I do not see wires from rear coming out anywhere near head unit. Even more - all pins on connectors seems to be in use.
Maybe someone had similar issue? Any advice how to trace those wires is welcome.

 

[Renorelie]

Hi, have you found something ? I was in the same situation, I finally found the connector with rear speakers cables behind the fuse box.
So now I "just" have to connect it to the brown ISO connector behind the head unit (on the external left and right empty slots).