Dell Inspiron 17 (5749, Early 2015) - Manual (Page 35)

NOTE: The cables on the keyboard are not folded when you receive a
new keyboard.
1 Place the keyboard on a flat and clean surface.
1 keyboard cable 2 keyboard-backlight cable
3 keyboard
CAUTION: Do not apply excess pressure while folding the cables.
2 Lift the keyboard cable and gently fold the keyboard-backlight cable at
the fold line.
35