Fitting a Dog Guard.

I am trying to fit a dog guard to a LSE Classic, can anyone explain to me how to do it?

I've not long removed the dog gaurd from my classic,there was a bracket on each side just behind the rear seat (on the parcel shelf support thing) held on with 2 bolts.The dog gaurd then fitted to the bracket using a large bolt on each side.This may vary as your dog gaurd might not be the same make as mine