to bi-wire or not?

passive biamping is more noticeable then bi-wiring because usually amplifier are more nonlinear than wires.
However it is a matter of fact (Ohom's law) that in both approach
the current is divided; high freq. current flows in one mean (cable or amp) and the low freq. current flows in the other.
If the wires were perfect then there would be no difference. but if wires distort then bi-wiring decreases intermodulation between high freq. and low freq. signals.   So it is more plausible that biwiring is more audible with low quality cables. In other words. biwiring is more effective with low quality cables. An amplifier is much more non linear that a cable so biamping (passive) effects is by far more audible that biwiring. Those who hear difference between cables are likely to hear also differences when they bi-wire their system.

Can someone post a photo of this bi-wiring while using a small thin gauge wire?

I was told by people here, that when using jumpers, try using, on one side (pos or neg) the upper one and the other, the lower one. They say it sometimes results in improvement over using both on the lower or higher posts.

I tried it that way, and going with both to the upper posts but it turned out that it sounded best the way the JBL instructs to: using the bass or lower posts. You just have to experiment.

Eventually, I found the best way was to thread the wire through the lower post's eyelet up to the upper one, using just the speaker wire itself. If it's too thick, just make an "S' shape with the wire going around the lower post to the upper post and tighten down the posts.

It's the most coherent sound I ended with.

All the best,
Nonoise

You should bi-wire it will be more dynamic,better bass more dynamic range do it asap.