Last two centers: one piece below
Step 1 / 4
D: Bottom face: turn 90°, front face goes right
The top already has three right pieces; the last one is on the bottom.
D lines up the bottom piece, Rw2 pairs it, then D' and Rw2 lift the pair up.
Step 1 of 4: D. Bottom face: turn 90°, front face goes right