[commodorenutt]

Can't help with specifics of that model, but by that age, the ADRs dictated the minimum of 3 points, so they will be there. I wasn't until later on that the ADRs dictated the need to have at least one fitted with a bolt/clip like a 2000s Falcon or Commodore, so you're looking for the threaded holes, which can be elusive in a wagon or hatch with carpet in the rear.

Lift up the carpet in the load area & see if they are visible in the floorpan. Otherwise check the rear of the seat back. They're the only 2 locations you'll find them in. They may or may not have plastic plugs covering them .