Oracle ZFS ZS3 Series Customer Service Manual page 225

f. Return the crossbar to its closed and locked position.
8. 7120 or 7320: Components may differ slightly between the 7120 and 7320,
however service procedures for each are identical. The illustration shows the
7320 controller. To install the top cover:
a. Place the top cover on the chassis so that it hangs over the rear of the
storage controller by about an inch (2.5 cm), then slide the top cover forward
until it seats.
How to Replace a 7x20 Controller PCIe Card or Riser
Servicing the Hardware 225