Replacing seat belt buckle

Fig 1: 4 Half Moon Clips From Underside Cushion

Courtesy of VOLVO CARS OF NORTH AMERICA.

Disconnect the connector.

Fig 2: 3 Half Moon Clips From Rear Edge Of Underside

Courtesy of VOLVO CARS OF NORTH AMERICA.

Remove two tie straps.

Route wiring.

Fig 3: 5 Half Moon Clips From Each Side Of Underside Cushion

Courtesy of VOLVO CARS OF NORTH AMERICA.

Remove the screw for the seat belt buckle, (Torx 50).

Install: 

In reverse order.

Tighten the seat belt buckle screws to 48 Nm  (35.4 lb.ft).