connection terminal; connecting terminal; connection port
Technical term for a physical point where electrical connections are made, such as on a device, circuit board, or connector.
This board has multiple connection terminals.
Please plug the cable into the connection terminal.
端子 is a general term for any terminal or connector pin. 接続端子 specifically emphasizes the connection function.
Compound of 接続 (connection) + 端子 (terminal). A straightforward technical term with no obscure historical derivation.