WANHAO PARTS DEPARTMENT
WANHAO DUPLICATOR 4 SERIES GENUINE REPLACEMENT PARTS
This 4-Pin connector is used to connect your thermocouples, your (Left extruder heater and fan combo), or your (Right extruder heater and fan combo) to the MightyBoard (microcontroller). This would be considered the "male" end.
Disclaimer - Price is for one part only. Image above may show multiple parts.