3Com 3C410012A - OfficeConnect Remote 531 Access Router Getting Started Manual page 31

Siting OfficeConnect Remote on a Desk 2-5
Figure 2-3 Attaching the Clips
4 Keeping the front of the units aligned, fit the second unit to the first.
Hook the top edge of the clips into the stacking slots on the bottom
edge of the second unit (the unit should rest on the clips spikes).
Push the clips into place (Figure 2-4).
Figure 2-4 Fitting the Second Unit