What about the connector and connector terminals?
The connector is a wire-to-wire connection; the connector is a connection between the wire and the board. In real life people often blur the same thing.
The terminal is part of the connector. Connector is a general term, in fact, we generally see the connector,
usually including shell (shell) and terminal (terminal) two parts. Housing is the majority of plastic, from the protective effect, terminal is metal, from the general use.