Quantum Scalar i500 User Manual page 236

Chapter 7 Installing, Removing, and Replacing
Adding Expansion Modules to an Existing Library
3 Remove the rack ears that fasten the module to the rack.
4 Loosen the thumbscrews located at the base of the front and rear of
the module.
1 Thumbscrews (behind doors)
Scalar i500 User's Guide 221