The Molex 0348992081 is a 2-position plug from the MXP120 34899 series, a sealed wire-to-wire interconnect family. The connector is designed for free-hanging (in-line) harness applications where environmental sealing is required — the sealed construction keeps moisture and debris out of the mated interface.
The 4.00mm pitch is a standard spacing for power and signal in sealed connectors — it provides enough creepage distance for the voltage rating typical of this class while keeping the connector compact. The sealed feature (not an IP rating, but a design intent) means the connector uses integrated seals — typically an interfacial seal and a wire seal — so the mated pair resists splash and spray.
This plug accepts blade pin contacts that are crimp-terminated to the wire.