A connector assembly including a first connector having a primary locking lever that is configured to mate with a second connector having a primary striker. The primary locking lever includes a beam extending along a mating axis and a primary latch configured to engage the primary striker. The connector assembly includes a connector position assurance (CPA) device slideably mounted to the first connector. The primary latch blocks movement of the CPA device from an initial position to a final position until the first connector and the second connector are fully mated. The CPA device defines a lateral flange that inhibits movement of a secondary latch of the CPA device under the primary latch that would allow the CPA device to move from the initial position prior to the full mating of the first connector and the second connector.