Then you need to use a two conductor plug (TS), don't use a TRS plug like you use for head phones. Look up Switchcrat part number 280. YOu can find them at the Fiend here.
You need 1/4" on one end and bare wires on the other? Buy a speaker cable (with 1/4" ends) twice as long as you need, cut it in half, and strip the bare ends.