Hello rosit   You should push from the top. Once you remove the 3 back screws and 1 bottom screw it should come off fairly easy. Thanks [IMAGE]
  I have two Dell T620 servers that I am trying to take off the left side panel.   I have followed the instructions in the User Manual and have taken off the right side panel, 3 back screws, and 1 screw on bottom.   The manual says to gently push from the bottom and the cover will come off.  Does anyone have any special trick to slide/pop the left side panel cover off?  From the inside I can see that there is a metal tab that is overlapping a tap from the cover.   Any help from experience to get this left side cover off would be appreciated. Thanks.
Help taking off Left Side Panel on Dell T620 server