Hotend Adapter Board for Creality K2 Plus K2/K2 Pro 3D Printer | Original K2 Hotend Plate, Extruder Hot End Cable Adapter Board for Creality Pro/K2 Plus 3D Printer Replacement Parts

Looks like the connector headers came off the toolhead adapter board. You can get a replacement off Amazon pretty quickly. Based off the pictures I think you have the heater plugged in sideways but might be mistaken. https://a.co/d/0fGzH41x