It carries a 4.20mm pitch and matching 4.20mm row spacing — the standard Mini-Fit Jr footprint that mates with the 5557 receptacle housing.
You need the matching 5556-series male crimp terminals (typically Molex 44476-1112 or equivalent for 18-24 AWG) to populate the cavities. For a 12-circuit harness, that is twelve terminals, twelve wire seals if the application is sealed, and the 5557 receptacle on the other end.
Panel-Mount Fit and Board Layout
This is a panel-mount, snap-in plug — it clips into a rectangular cutout in the enclosure wall or a bulkhead, not onto a PCB. The locking ramp faces outward from the panel; make sure the cutout orientation matches the ramp direction so the latch engages when the receptacle is pushed home.
It is a current-production part from the Mini-Fit Jr 5559 line, which is one of Molex's highest-volume power connector families.