I just purchased an inkbird ITC-106vh PID and it came with a K-type thermocouple. This will be my first time building anything like this or wiring a PID. I noticed the thermocouple has a loose-fitting, free-spinning threaded fitting at the end. Does anyone know if I need another part to thread this into? Or perhaps I just need to incorporate a nut into my build that this will screw into? Here is a link to the one I purchased.