So, after upgrading my front speakers, I want to do the same with my back ones, I have checked the back and the wire is there for the speakers but currently I have no noise coming out of either of my rear speakers.

Im not a wiring guru so don't know much about what to plug in where lol so I took some pics of the back of the head unit to see if you lot might know what it could be, I don't want to take it to a shop to find out it might of been a 5min job!

Pics...








Dunno what these are?




All comments/diagrams welcome

Cheers