Juniper MX960 Hardware Manual page 322

306
Figure 92: Fan Tray Connector on Extended Cable Manager Top Hat
6. Using the four acorn nuts saved in "Removing the Original Top Hat of the Chassis" on page 297, secure
the top hat to the front of the chassis by tightening the nuts on the threaded studs inside the holes in
the top hat front flanges (see Figure 93 on page 307). Use a 3/8-in. wrench to access the nuts between
the top hat front flanges and the rear of the routing channel bays.