From the '98 V70 Owner's Manual:

pg. 61 Luggage net, Side cargo net - wagon (certain models)

Luggage net


The luggage net helps prevent cargo from being thrown forward should the vehicle stop suddenly or be involved in an accident.
The net unreels from the rear upper edge of the rear seat backrest and must be accessed from the cargo compartment.


1 Open the cover on the passenger side seat back and pull the luggage net toward you.
2 Hook the rod onto the bracket on the right side ceiling (A).
Pull out the left side of the rod and attach it to the bracket on the driver's side ceiling (B).
3 Unreel the driver's side luggage net.
4 Hook it to the rod.
Make sure the nets are securely attached to the hooks under the covers and pulled taut.


Use the reverse procedure to retract the net.


NOTE: The luggage net can also be used when the rear seat is folded down. However, extra brackets (optional) must be installed on the upper front door hand grips.


WARNING! If your car is equipped with an auxiliary child seat in the cargo compartment, the cargo net must be retracted before using the child seat. Otherwise, in the event of a sudden stop or accident, the child could be injured and the net could hinder rapid access to the cargo compartment.


p.s. URL is http://apps.volvocars.us/ownersdocs/1998/1998_SV70/98sv70_057.htm#pg61