A connector configured for receiving a cartridge for forming a teatcup where the cartridge includes an elongated sleeve and a barrel pre-mounted in the elongated sleeve and having an inner space for receiving a teat and the connector includes a lower base member and a shell extending from the lower base member and surrounding a receiving space for receiving the cartridge, the lower base member and the shell foringm one piece of a plastic material, and the shell being configured to extend along an axial length of the elongated sleeve at least to the upper end of the sleeve when the cartridge is received in the connector.
