Apple Macintosh Performa 570 series - Manual (Page 98)

8 Slide the logic board (the board that holds the components that make your computer
work) partway out until you have complete access to the slots at the right side of
the board.
You’ll need to hook your fingers around the little metal boxes to pull the
logic board.
WARNING Don’t pull the board all the way out; this can damage your
Macintosh.
90 Appendix B