Secondary lock
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.
Courtesy of VOLVO CARS OF NORTH AMERICA.
Press in the active catches on both sides of the socket housing and slide out the receptacle housings.
CAUTION:
Disconnect and work with only one cable at a time to minimize the risk of mixing them up.