Heater connector on the motherboard
Heater connector on the motherboard
In this scenario, I typically remove the connector from the fan cable and insert the wires into a Molex module. Use 5V for mid-speed operation with minimal noise, and 12V for full speed—only two wires are needed (GND and VCC). If you need something less damaging, you can gently pull out the pins from the fan connector with a needle and reinstall them later if you want to use it normally. Just check the pin layout on Google to stay clear.