Dell XPS 15 Service Manual page 23

2 Lift and slide the solid-state drive assembly from the system board.
1 screw
3 solid-state drive slot
3 Remove the screw that secures the solid-state drive to the solid-state
drive bracket.
1 solid-state drive bracket
3 solid-state drive
2 solid-state drive assembly
4 system board
2 screw
23