Volvo 2008 V70 Owner's Manual page 196

Two cassettes containing nylon cargo nets are stored in a compartment under the cargo area floor.
Attaching the cassette(s)
The two-sections of the net are attached to the rear side of the rear seat backrest. The cassettes have different widths,
and the widest section should be mounted on the right side (seen from the rear of the vehicle).
1. Fold down the rear seat backrests.
2. Align the cassette's mounting rail above the mounting brackets on the backrest .
3. Slide the cassette onto the mounting brackets .
4. Return the backrest to the upright position.
Using the net(s)
With the backrests upright
The net is pulled up from the cassette and locks in position after approximately 1 minute.
Pull up the right side of the net by grasping its strap.