LifeSpan Workplace SD9 Owner's Manual page 16

Step 6: Attaching Motor Control Unit
A. Place the Motor Control Unit (item 6) into position. Mark the hole
locations onto the desk and drill holes matching the depth of the
M5x16 Wood Screws.
B. Place Control Box(item 6) back into position and screw into place
with the two wood screws.
Note:
Make sure the Motor Control Unit lies flat on the desktop
when attaching. Failure to do this may result in an error code.
M5x16
Power
Drill
Recommended
SD9 Desk Assembly
Screwdriver
17