Apple Macintosh Performa 6400 Series - Manual (Page 138)

7 Reinsert the screw into the PCI card fence and screw it into place.
To help insert the screw, push the PCI card fence forward with your thumb so
the screw holes align. Insert the screw until it’s somewhat steady, hold your
thumb underneath it (to prevent it from falling), and use the screwdriver to
screw it into place.
You may find it helpful to
support the screw with the
thumb of your other hand.
138 Chapter 9