You will need the matching Micro-Fit 3.0 male crimp terminals (typically Molex 43030-series or equivalent) to populate the 4 positions. The housing accepts the Terminal Position Lock (TPA) feature, which locks each terminal into its cavity after insertion, preventing back-out under wire strain.
This plug mates with the Micro-Fit 3.0 receptacle headers (vertical or right-angle, through-hole or SMT) on the same 3.00 mm pitch. The single-row, 4-position layout is a common footprint for low-circuit-count power taps. Termination is crimp-style, free-hanging (in-line), so the housing floats in the harness rather than locking to a panel or board.