'69 Barracuda AM/FM radio wiring help

I'm in the process of rewiring the dash on my '69 Barracuda. The original harness burnt up and many wires melted together. The new harness has been pretty much plug-n-play, however, I'm having issues with the wiring on the radio. In the 1969 Plymouth service manual I have, the schematic shows the plug out of the radio with the red and orange wires. There is also a green and black set of wires coming out of the radio, but there's no such wires shown on the schematic. Speaker wires, perhaps?

I'm waiting for a few new switches to arrive, so I have time to figure this out. Any help is greatly appreciated!!

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