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: Identifying Split Pin
Courtesy of VOLVO CARS OF NORTH AMERICA.
Install:
brake pads
one split pin and retaining spring first, then the other split pin.