Bi-wires links for speakers ?

I would try replacing the links with a thick 12awg. You should not hear a difference because there's none.
 It's only 3inches between the posts, so resistance should be in the neighborhood of 0.000003 ohms....in other words, there's nothing to fix.
I like the manufacturers links on some speakers because they look neater than wire, but everyone is different.
No worries about jumpers... manufacturers would not compromise their signature sound by not having the metal links replaced by a 3" wire if it could  make a difference. 

Agree on biwiring, if it is there, you may try that.  sometimes it makes a positive difference sometimes not; many manufacturers such as focal and harbeth and others have admitted that the reason why they offer biwiring is strictly because of market trends. Focal actually dropped the biwring posts on many models.

Agree with ryder, biwiring terminals is mostly for bi-amping, more power on tap makes huge difference in terms of dynamics and control.
One more thing... Plug one cable leg on the positive of the tweeter, and the other on the bass negative.

wow! who would know that 4 inches between the posts could make such difference!