I will have to check the manual i think as the rear seat is a fold up seat which is built in.
I hafve a 7 seater Toyota Kluger KX-R (if you find any info) - i am assuming with the rules in vic i should be able to have a booster seat from 4yrs old in there as lond as it doesn't have an anchor strap.
There are no anchor points in the rear of the kluger.