In order to put back correctly the 2 Torx T8 6,6 mm in the hard drive through the airport grid, I used a pick (to play guitar) to lift up the hard drive in order for the 2 screws to reach the hard drive holes.
I inserted the pick in the little space left between the mother board and the hard drive. Then, by leaning the pick against the motherboard, it lifted up the hard drive against the grid. Then it was super-easy.
Hope it might help…