[Anthony]

I'm not sure what you asking:

Edit: I looked at it all again and the main confusion is that you refer to legs by number and your diagram has no such markings.

For signal level, the shield or outer contact is ground and the pin is signal.

You would need a matched pair for both speakers (assuming a LR and that they needed the same BSC based on room position).

Edit:
It looks like signal would come in top left leg and the shield/ground would be the bottom.

I hope that clears things up a bit (as I understood the question at least).

Good luck.