The cable is from the EV connector (genuine original part) for General Motors Ultium platform like Blazer EV and Honda Prologue.

The WTUS1450THB8A3 is an OEM NEMA 14-50P adapter plug used for portable EV mobile chargers, compatible with various electric vehicles, including Honda Prologue, GM, Ford, and VW. This 50-amp, 240V plug allows for Level 2 charging via a standard NEMA 14-50 outlet, often used for home, RV, or industrial applications