C70 Coupe L5-2.3L Turbo VIN 53 B5234T3 (2001)
Most cable terminals have one or two locking tabs which retain the cable terminal in the cavity. There are also cable terminals without any locking tab.
It is important that the locking tab is sticking up from the cable terminal so that it catches properly in the housing when it is connected.
Dimples
Some tab/receptacle terminals in single pin (and multi pin) variants have dimples in the housing.
The dimple is a mechanical locking device between the tab and receptacle terminals.