If you want to open the load compartment floor while the folding bench seat is folded back, you must first of all remove the seat cushion.
Removing or fitting the seat cushion
To remove:
fold seat cushion vertically upwards and remove it from seat cushion guide . Fitting
Push seat cushion into seat cushion guide at a slight angle from the rear .
Fold seat cushion back into its starting position until it engages.