Zacharu

I bought a new radiator and already installed it, but I noticed that instead of a thermocouple prong there is a cap on the new radiator, so there's a wire for the fan that not's connected to anything. Does anyone know if I'm supposed to forcibly remove the mysterious cap?

I installed a new radiator yesterday, but the new one didn't have a prong for the thermocouple... Anyone have a clue?