Nordost flat Leifstyle cables for sub?

I need to use speaker-level input to a KEF Kube 10b sub, because the Ayre A7e has no preamp output.  I have a pair of Nordost flat cables I'm not using.  Would they be suitable?  The 10b will augment a pair of KEF LS50s if that's relevant.

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I found a pair of spare Clear Day cables, so I'll use those even though it may seem like overkill.  I'd be tempted to try 16 gauge zip cord if it we didn't have the virus restrictions on shopping.  I'm using Clear Day cables between the Ayre A7e and KEF LS50s the 10b will augment.

The only thing you can do is try it and see, just make sure to try it first with the volume at zero and then slowly bring it up . If it doesn't work you'll know about it pretty soon.