An assembly and method for securing and supporting electronic components in a computer node disposed on a computer rack. The method comprises the steps of first disposing a tray having one or more wedge block assemblies in the rear of said rack such that each wedge block assembly can be moved under and engaged with each node. The wedge block mechanism is retained from side to side using guide brackets. The mechanism and the tray are then torques into place by using incorporated hard stop feature on said tray. The nodes can then be engaged and disengaged through the engaging and disengaging of the wedge block assembly. This is done by using a rod that is connected to a fastener one end and to a pivot at another end and is integrated into the wedge block mechanism. Once the fastener is moved the pivot is also moved causing the mating and unmating of the node.