Apple Power Macintosh 5400 series - Manual (Page 162)

2 Slide the logic board back into the computer.
3 Slip the three tabs at the top of the back panel into the grooves in the computer’s case.
Slip the three tabs on the
back panel into the grooves
in the computer case.
Gently but firmly
push on the vertical
plate until the logic board
is solidly back in place.
150 Appendix B