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.
Fig 1: Removing Holder From Base Section Using Screwdriver
Courtesy of VOLVO CARS OF NORTH AMERICA.
Remove:
the screws on the front edge
the holder from the base section using a screwdriver
holder with the cable lead in from the base section and push to one side.