I don’t know if anyone has tried it but I thought of this way of attaching a speaker cable to my biwired speakers. Sound definitely better than what it does with any jumpers or separate wires. Do try if you are using bare wire connection. Just strip of a sufficient length of wire on the tip and pass it through the hole in the terminal toward the other terminal where jumpers would normally connect. Then you can tape off the remaining bare ware (or apply heatsink) on the other side of the hole and connect to correct terminal.
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