A connector for connecting a tube within a receptacle. A latching component fits within the receptacle, and receives a plug member to which the tube is connected. One end of receptacle is adapted, for instance, to be attached to a tube on a motor drive unit of a breast pump assembly, or formed integrally therewith. The opposite end of receptacle receives components of the connector therein. The plug member is inserted into the latching component and has means thereon that engage corresponding means on the latching component such that the plug member is releasably secured within the latching component in a rotatable manner.