Using biwired cables on speakers with only 2 connections

I love getting myself in trouble🤣. 

Skin effect is real.

You want the high pass connected for sure. The HP run has much thinner wire than the LP. There will be a clarity in the high end you just can't get with the LP section.

The LP section is designed to pass current. Woofers love current. Smearing is not an issue.

Conduct your own experiment: listen for a couple of days with only the HP connected. This will get your ears used to a certain 'sound'. Then switch to the LP only. Use music with a lot of singing. Use only well recorded songs. You will know within minutes.

If there is absolutely no difference, sell the wire. If there's a noticeable difference, now connect both and make a new observation. 

Love this hobby.

I build my own speakers. 4 wires from the amp. 40awg to the tweeter, 36awg to the midrange, 18awg to the midwoofer, and 11.5awg to the woofer. 5 years of experimentation got me to this point. Love being an excessive compulsive.

Never seen an 11.5awg wire before 

Use banana to spade adapter. Search amazon. 

Piggyback banana adapters are available 

they have one make that would plug into the speaker in your case , two females that you would plug both the high and low sides of the biwire into , most often one of the females is angled 

Biwiring is nonsense anyway.  The two sets of terminals were originally for bi-amping, bi-wiring is the product of a bored audiophile with an active imagination.  Just leave the extra connections off and cover them with electrical tape to prevent shorting.  Of course someone will tell you that the kind of electrical tape will make an audible difference.