3-pin IEC C14 panel mount connector, which is the male mate to the power cord IEC C13 connector. This is typically the battery charging port connector used on mobility scooters, power chairs, electric bikes, & electric pedal assisted scooters.
This connector is a panel mount design with 0.25" straight connectors.
This is a universal, 3-pin connector. It is typically found as the battery charging port connector on mobility scooters, power chairs, electric bikes, & electric pedal assisted scooters. If it matches the connector on your ebike, then it should be a compatible option.