Lenovo ThinkStation P720 Hardware Maintenance Manual page 203

9. Route the cables through the two holes in the rear of the flex module. Position the flex module cover on
the flex module. Ensure that the rail guides on the bottom of the cover engage the rails on the flex
module. Then, push the cover to the front of the flex module until it snaps into position.
Figure 178. Reinstalling the flex module cover
10. Install the flex module into the flex bay.
11. Connect the cables to the front Thunderbolt PCIe x4 card and the system board.
• Connect the GPIO cable to the Thunderbolt control connector on the system board. See "Parts on the
system board" on page 38.
• Connect the internal DP-to-DP cable to the DisplayPort connector on the front Thunderbolt PCIe x4
card.
• Connect the mini-SAS cable to the SAS connector on the front Thunderbolt PCIe x4 card.
12. Reconnect any removed cables to the flex module.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to "Completing the parts replacement" on page 220.
Slim optical drive
To install or replace a slim optical drive in the flex module, do the following:
1. Prepare your computer. See "Preparing your computer and removing the computer cover" on page 103.
2. Remove the flex module out of the chassis. See "Device in the flex bay" on page 105.
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Chapter 9 Hardware removal and installation
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