What it is and where it fits
The Molex 399200502 is the 2-position member of the Eurostyle 39920 series, a side-entry through-hole terminal block built around a 15 mm (0.591 in) pitch. Rated 85 A per circuit at 600 V, it uses a screw-rising cage clamp termination that accepts 3–14 AWG solid or stranded wire without a ferrule — the clamp bar rises as the screw tightens, capturing the full conductor cross-section. Contacts are copper with tin plating; the cage clamp is brass with nickel plating; the M5 mounting screw is stainless steel with tin plating.