function as an extractor the drive assembly adapted to drive carriage 306 along spindle 302 is provided with a knob shell 422 which rotates spindle 302 thus as knob shell 422 is rotated in a clockwise manner module 102 is driven inwardly when knob shell 422 is rotated in a counterclockwise manner module 102 is extracted a more detailed description of the structure and operation of extraction device 116 can be found in the above referred to cited u s pat no 3 640 141 as stated previously the angle formed between the axis of the spindle and the axis of the connector interface the insertion axis creates an unwanted force substantially perpendicular to the axis of the male of female connector pins and sockets respectively when module 102 is being extracted through the action of extractor device 116 this unwanted force perpendicular to the insertion axis can damage the connector pins and render extraction of module 102 much more difficult it has been discovered that this problem can be solved through the use of a hold down bracket of the type described below fig6 is an isometric view of hold down bracket 600 in accordance with a first embodiment of the present invention as can be seen it includes a longitudinal plate 602 having a generally.