@stanleym9999, IME good cables can be can be had for much less money. The savings might be put to better use elsewhere.
May I offer for consideration : Alpha-Core Goertz MI series. Alpha-Core used Thiel as a reference. Jim Thiel reccommended the Alpha-Core’s, and the Alpha-Core’s are known to be a good match with Threshold. I strongly urge you to use Alpha-Core’s "L-C networks" (AKA: zobels), especially with wide bandwidth amps such as the Thresholds (at least the earlier models were, not so sure about the post Nelson Pass models).
Another good match, previsoulsy used by Jim Thiel are the Straightwire Maestro’s. Also, your Thiel’s are internally wired with Straightwire