Molex CP-6.5 Series Retainer

51143 series 6.5mm terminal position assurance (TPA) retainers for use with 6.5mm wire to board crimp receptacle housings locking the terminals in place inside the connector.
Stock number 905-9903 is a 1 circuit TPA for use with the 51142 series 6.5mm wire to board crimp housings
Stock number 905-9907 is a 2 circuit TPA for use with the 51142 and 151049 series 6.5mm wire to board crimp housings
Stock number 905-9916 is a 3 circuit TPA for use with the 51142 series 6.5mm wire to board crimp housings

Molex CP-6.5 6.5mm Wire-to-Board Connectors