EXFO FTB-1 - Manual (Page 34)

Getting Started with Your Unit
24 FTB-1
Securing Your Unit Using a Kensington Lock
Securing Your Unit Using a Kensington Lock
All the modules that you can use with your unit are equipped with a
security slot to which you can connect an optional Kensington lock
(security cable). Once the module is inserted in your FTB-1, you can secure
your unit with this lock to help prevent theft.
To secure your unit:
Connect your lock to the security slot located on the side of your module.