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1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   bay
      <hardware> (As in an aeroplane "cargo bay") A space in a
      cabinet into which a device of a certain size can be
      physically mounted and connected to power and data.
      Common examples are a "drive bay" into which a disk drive
      (usually either 3.5 inch or 5.25 inch) can be inserted or the
      space in a docking station where you insert a notebook
    computer or laptop computer to work as a desktop computer
      or to charge their batteries, print or connect to the office
      network, etc.
      (1999-01-11)