A connector for coupling to a base of medical device equipped with a circular hub having a circumferential recess. The connector includes a cap having a top surface, a bottom surface, a central region, and a circumferential region. The cap defines at least two pairs of slots extending from the circumferential region towards the central region dividing the cap into at least two fixed lobes and at least two resilient lobes. Each resilient lobe has an outward projecting lift tab, an inward projecting catch, and at least a resilient region. Positioning the connector on the circular hub and pressing the connector engage the catches with the circumferential recess of the circular hub so the connector can rotate completely about the circular hub. Lifting at least one lift tab to reversibly displace the resilient lobe and its respective catch radially to disengage from the circumferential recess decouples the connector.