Primary locking in cavities
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
Cable terminals without locking tab
The primary locking is permanently located in the housing as an integral part of the cavity.
Cable terminals without locking tabs are used with housings which have integral primary locking in the cavities. An example is the 1.6 Pin/Socket.