HP C100/110 - Manual (Page 166)

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Changing Your Workstation’s Hardware Configuration
Installing an EISA or GSC Option Board
4 Remove the EISA Slider, as shown in Figure 42.
5 In the desired EISA slot, turn the blank plate’s locking knob counter-clockwise
to unlock the plate, as shown in Figure 42.
Figure 42 Removing the EISA Slider and Blank Plate
6 Remove the blank plate from the slot, as shown in Figure 42.
Blank Plate
Locking Knob
EISA Slider