Abstract: A connector (2) for establishing a plug connection with a mating connector (3) comprises at least one guiding element (21) for guiding the plugging together of the connector (2) with the mating connector (3) and at least one orientation structure (25; 27). The guiding element (21) has an elongated design and protrudes from the connector (2) along an extension direction (E) and the orientation structure (25; 27) is configured to provide a rotation lock with a complementary orientation structure (24; 37) provided on the mating connector (3) with respect to a rotation of the connector (2) relative to the mating connector (3) upon connection of the connector (2) and the mating connector (3). A connector system (1) comprises such a connector (2) and a mating connector (3), the mating connector (3) comprising at least one receptacle (31) for receiving the at least one guiding element (21) of the connector (2).