What types of Kensington locks work with Synology NAS?

Does this iMac have a Kensington security slot and what if not? kensington security slot Buy Kensington Security Slot Adapter Kit for Ultrabook featuring Adds Kensington Security Slot, Adhesive Attachment, Works with All T-Bar Locks kensington lock slot lenovo A Kensington lock is a security device that attaches a cable from a computer to a stationary object such as table

kensington slot Kensington security slot in a server in the desktop position