IBM 220 - Manual (Page 47)

Chapter 5. Installing options 37
Rotating the stabilizing feet
The feet attached to the bottom cover rotate 90 degrees to provide additional stability
for your server.
Place the server in an upright position; then, rotate the feet a quarter turn away from
the server. Carefully position the server on its feet.
When you need to access the inside of the server to install options, you might find it
easier to place the server on its side, so that the system board is facing you. If you do
so, rotate the feet in towards the server, so that they do not break off due to the weight
of the server.