Are you intending to use what's in the photo per speaker (i.e. a + and -)? If so, I can't see how it can't short. I would assume that it's some sort of audiophile nonsense about having copper and whatever the silver material and that provides some sort of "best of worlds" bollocks.

From the photo there doesn't appear to be any sort of insulation and I'll be surprised if it worked previously with the two metal types split to provide the current path to and from the speaker.

The concept of oxygen free copper is that has basically the lowest resistance possible. In terms of speaker wiring it's unlikely to make noticeable difference and to some extent it's snake oil. But people believe just like they believe a $1000 power cord magically makes a home stereo sound better or a wooden volume control knob improves the sound.