PSA you do NOT need OWC's thermal sensor cable to silence your iMac's fans - there's a much cheaper hardware solution! : r/applehelp
OWC In-line Digital Thermal Sensor for Apple iMac 2011
Thermistor Temperature Sensor Module Thermal Sensor Module Thermal Sensors Do The Digital Output/temperature Control Switch - Integrated Circuits - AliExpress
B + B Thermo-Technik 0220 0001 0220 0001 Flat Thermal Connector | Conrad.com