Dell Precision 7740 Service Manual page 81

c. Connect the LED board cable [1], speaker cable [2] and touchpad cable [3] to the connectors on the system board.
d. Place the Type-C USB bracket onto its slot on the system [4].
e. Replace the 3 (M2.0x5.0) screws to secure the Type-C USB bracket to the system [5].
Removing and installing components 81