Zero the contact reel
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.
Rotate contact reel carefully to the right-hand limit.
Then turn 2 rotations to the left. Then continue to turn until the contact reel can be locked in position at 1 o'clock, see Fig 1.