Shuttle FS51 Instruction Manual page 16

5JAF #
Mount the Mainboard on the Computer Chassis
1. You may find that there are a lot of different mounting hole positions
both on your computer chassis and on the mainboard. To choose
correct mounting holes, the key point is to keep the back-panel of the
mainboard in a close fit with your system case, as shown below.
2. After deciding on the proper mounting holes, position the studs between
the frame of the chassis and the mainboard. The studs are used to fix
the mainboard and to keep a certain distance between the system's
chassis and the mainboard, in order to avoid any electrical shorts
between the board and the metal frame of the chassis. (If your computer
case is already equipped with mounting studs, you will need to tighten
screws to attach the mainboard.)
Note: In most computer housings, you will be able to find 4 or more
attachment points to install mounting studs and then fix the
mainboard. If there aren't enough matching holes, then make sure
to install at least 4 mounting studs to ensure proper attachment of
the mainboard.
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