Pull back the blue release tabs on both sides and slide the drive bays into the system, until both the bays lock into place.
Figure 1. Closing drive bays
If required, lock the drive bay lock that is located above left release latch, by pushing it down.
NOTE:In some circumstances, the drive bays may not close after fully opening, due to the sheet metal on the rail bracket being bent and blocking the rail stop. To fix the issue, use a plastic scribe to pry the sheet metal back to its default position and try closing the drive bays.