Soldering equipment and heat shrink tubing. Get the parts ready. The part number is 276-1427A. Attach one wire from each of speaker wires together, solder them together, then solder the pin connectors on. Some heat shrink tubing finishes the pin end. Now solder each thermistor to the other end of the speaker wires.
Heat shrink tubing completes the process.
Twenty minutes and the hardware is complete. I wound the speaker wire around a screwdriver to give it the classic tangled phone cord look.