Manual

18 Dell™ PowerEdge™ 4210 Installation Guide
Figure 1-7. Rotate Front Door
6 Rehang the front door by reversing the steps in "Removing the Front
Door."
7 Reverse the lock catch.
a Use the #2 Phillips screwdriver to remove the two #2 Phillips screws
that hold the lock catch to the middle horizontal frame member.
b Remove the lock catch and rotate it 180 degrees.
c Reinstall the lock catch on the new horizontal frame member by
aligning the holes of the catch with the holes of the frame member
and then reinserting the two #2 Phillips screws.