Dell Precision 3430 Small Form Factor Service Manual page 92

4 Release the hard drive and optical drive module:
a Disconnect the hard drive data cable and power cable from the connectors on the hard drive [1, 2].
b Slide the release tab to unlock the hard drive and optical module [3].
c Unroute the hard drive cables [1] and optical drive cables [2] through the retention clip and HDD-ODD release tab respectively.
92 Installing the USB Type-C card