Are these hooked up right?

Back story: I'm a non-audiophile. Essentially inherited a hifi (or maybe midfi) system that I'm trying to get hooked up. It was in an inlaw's basement for years and is pretty beat up but functional and consists of:

Rotel RSP-1066 Surround Sound Processor
Rotel RMB-1075 Five Channel Amplifier
Two Bowers and Wilkins CDM-9NT tower speakers
One B&W AW 650 powered subwoofer
One B&W CDM SNT speaker which I think was used for the center channel

I posted about this in the home theater forum to work on settings within the surround sound pre-amp and I've got those narrowed down. In one of the surround sound modes I can get it all sounding pretty good.

But without the sub-woofer and the center speaker I just can't get the two tower speakers to sound good in 2 channel mode. (I'm comparing the SQ to another much nicer system that is now in my home). And that is bothering me because I would prefer to have this set up just with the two towers.

These speakers (and the center speaker) have two sets of poles for hooking them up. So do my Aerial Acoustic towers but they came with bi-wire cables. These B&Ws do not have bi-wire cables so I have the speaker cables hooked up as shown below:

https://images.nikonians.org/galleries/data/500/IMG_10511.jpg

The gold colored bridges (?) can be removed.

Would bi-wire cables improve the sound? I made my own bi-wire(??) using two sets of cables to the speakers using the same two poles on the back of the amp but that did not make a difference.

Any help appreciated.