Cisco Catalyst 9407R

Step 5 Attach the lug to the two posts, secure with the two nuts, and tighten with the torque driver. The fastening
torque is between 2.0 and 2.8 Nm. Do not overtorque.
Always use a torque driver when you have to tighten nuts; it prevents you from overtightening them.
Note
Cisco Catalyst 9400 Series Switches Hardware Installation Guide
121
Removing and Replacing FRUs
Connecting the DC-Input Wires