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An expansion module for a 5.25-inch disk has a wing extending toward the back of the computer. An expansion module that does not use 5.25-inch media need not have the wing extension; it can be the size of a battery, which fits into the same slot. The expansion bay has a hinged door that covers the extension part of the opening when a small module is installed.
Figure 4-1 and Figure 4-2 show front and back views of the expansion bay module for a device that uses 5.25-inch media. Figure 4-3 and Figure 4-4 are corresponding views of a smaller expansion bay module. The modules are the same size and shape as the expansion modules for the PowerBook G3 Series 1999 computers.
Figure 4-1 Front view of an expansion bay module for 5.25-inch media
Figure 4-2 Back view of an expansion bay module for 5.25-inch media
Figure 4-3 Front view of a small expansion bay module
Figure 4-4 Back view of a small expansion bay module
Each expansion module has a notch on the side for the latching mechanism. The notch is on the left side of the module, which faces the front of the computer when the module is installed.
To obtain manufacturing specifications for the expansion bay module, contact Apple Developer Support.