FAT4 "Molex" housing with 8 crimp terminals.
People often call this housing a "Molex" housing, which is wrong. A long time ago, the MOLEX company created the specification for this housing type, as they did to a thousand other housing types. The MOLEX company has stopped manufacturing this part a long time ago, as it officially became end of life. Somehow this housing type never died though and other companies had to continue making it. You can use them with different wire sizes (18 AWG, 0.75 mm², 17 AWG 1.00 mm² - and our very special 15 AWG 1.50 mm²).
This 5 1/4" device power housing (that's what it was called officially) comes with 8 crimp terminals, twice as much as you need.