1964 kriesler mono radio wiring

the wires coming out of this mono radio are one single yellow wire about 15 amp and in a sheath a very light red single wire and a very light green wire both have like a wire mesh (shield?) around them. I guess the yellow would be power. only a single speaker will be used, so is the RED / green for the speaker pos and neg? what do i do with the shield wire, I'm restoring an old 1950's car. thanks for your helpI might be old, but I aint dead yet

The shield is already broken, you don't have to use it. If you must, you can ground it. It was probably for a connecter with four pins, and the shield grounds the connecter, sort of how a Coax Cable F connecter is grounded with that shield. That's my guess...