where is the pig tail location for the radiator coolant temp sensor?

Question

I am a collision tech at an auto body shop. I just recently replaced the radiator in a 2015 buick encore. I was switched the cooling temp sensor over to the new radiator. there was no pigtail hook up for it that I could find when installing. now im getting a circuit high code for the radiator coolant temp sensor. any help of knowing where this pig tail might be or what is going on?