IBM S544-5343-03 - Manual (Page 179)

Uncoupling Two 500-Sheet Paper Tray Support Units
1. Remove the left side locking clip.
2. Remove the right side locking clip.
3. Hold the upper support unit by the recessed grips and lift it off the lower unit.
4. Store the support units and locking clips for future use.
Chapter 7. Installing Printer Options 159