2 Pin JST-VH Connector. Commonly used on printers for connecting Heater wiring to controller boards. 

Typically found on Hot end connectors on Creality CR-10 series 3D printers. 

To use, strip the insulation from wire and crimp the pins to each wire lead. Orientate the pin with the latch facing towards the opening on the face of the connector. Insert the pin into the housing until it latches in place.