Building out my home gym and I have two surround sound speakers in both corners (red circles) but if I put the subwoofer in the corner (blue circle), the far wires don’t reach, and I feel like that might not be the best placement.

Where would you put the subwoofer in my scenario? Should I put a shelf above the barbell rack (green circle area)?

P.S. I have a center channel bar below a TV on the wall behind me while taking this photo