Dell Latitude 7280 Owner's Manual page 25

c battery
3 To disconnect the smart card cable:
a Disconnect the smart card cable [1].
b Lift the smart card cable that is affixed to the computer [2] to reveal the touchpad panel cable.
4 To remove the touchpad panel:
a Disconnect the touchpad panel cable from the touchpad board [1].
NOTE:
b Remove M2.0 x 2.5 screws that secure the touchpad panel [2].
c Lift the touchpad panel from the computer [3].
Touchpad panel cable is below the smart card cable.
Removing and installing components 25