Dell Inspiron 15 (3531, Mid 2014) - Manual (Page 36)

Procedure
1 Lift the connector latches and using the pull tabs, disconnect the
touchpad cable and power-button cable from the system board.
2 Note the power-button cable routing and peel it off the palm rest.
1 power-button cable 2 connector latches (2)
3 touchpad cable 4 pull tabs (2)
36