From the manual:
Plug the red end of the ï¿½K type thermocouple into the
TEMP jack and black end into the COM jack. Touch
the surface of the object or area with the temperature
sensor for measurement.
Normally TC connectors have special construction specific to the type of thermocouple. But a lot of the Chinese meters use banana plugs, I assume the cold compensation is physically connected to the input jacks.
Lots of them on ebay:
»www.ebay.com/itm/K-Type-Thermoco ··· 04eecf9c