Setting Up Your Server 3-174. Unlock the rail assembly.Unlock the rail assembly by applying force to the tool in the direction shown by an arrow.5. While the rail assembly is being unlocked, remove it from the rack.6. Insert the tool into the angle hole at the rear of rail assembly to unlock it.Rotate the tool as shown in the figure below to unlock the rail assembly.7. While the rail assembly is being unlocked, remove it from the rack.Locking springViewed from front Viewed from topViewed from front Viewed from sideAngle hole