The Molex 5046940201 is a 2-position plug housing from the CP-3.3 504694 series, designed for free-hanging (in-line) wire-to-board or wire-to-wire interconnects.
This housing ships empty. The housing accepts male pin contacts terminated to wire via crimp — the exact terminal part number depends on the wire gauge you're running. Without the contacts, the housing is just a shell; the latch lock and the PBT body provide the mechanical retention, but the electrical path comes from the crimp terminal you insert.