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: Setting Contact Reel To Zero
Courtesy of VOLVO CARS OF NORTH AMERICA.
Install screw in contact reel lock position.
The contact reel is now reset and locked (secured).