I'm trying to connect a stereo system to speakers built into the wall. On the wall there are 4 colored wires coming out (3rd picture).
The wires for the stereo are the other two pictures. There's two connectors (that are marked with positive and negative wires on each) that plug into the back of the stereo (picture 2).
The wires are spliced to make another set of 4 wires in the middle.
Which wires do I connect to what?