Where is the rear isofix point on a new shape renault megane.l have found one metal ring, but l think it might be the luggage securing point?

Imagine sitting in the car, your bum will be at the bottom of the seat back and the rear of the seat base, where the seat back meets the seat base there should be a metal bar which runs along the rear of the seat, this is where the isofix points can be secured too. There may be a top isofix where the seat can be tethered over the top and onto the boot floor.