Keep in mind the following
WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.
The secondary locking must always be adjusted to the initial position.
The secondary locking must be closed in reverse order to the way it was opened.
When the secondary locking is closed a "click" is often heard.
If it cannot be closed it might be because the cable terminal is not completely inserted in the cavity.
If the connector has a sheath, cover or rubber gasket for the housings, do not forget to reinstall it.