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 Connector 24/19 To Wheel Sensors
Courtesy of VOLVO CARS OF NORTH AMERICA.
Separate the connector to the fuel pump.
Check the color markings on the hoses and pump.
NOTE:
The feed line is marked with yellow tape, corresponding to the color marking on the pump.