explained herein as shown in fig3 the apparatus includes a wafer track 52 along which wafers are conveyed to fill the wafer cavity 19 within the ibfd and ultimately to expand the height of the ibfd once the last wafer has been introduced into the ibfd it is necessary to remove the inserter 50 the preferred embodiment of the invention contemplates a track connector 46 that helps to integrate the wafer track 52 with the interior cavity of the ibfd and to provide a support surface for the wafer stack within the ibfd details of the track connector 46 are shown in fig8 a 8 f and fig9 in particular the connector 46 includes connector posts 47 that project downward with the ibfd as best seen in fig9 these posts engage corresponding openings 71 in an insertion plate 70 see fig1 to provide an interface between the inserter apparatus 50 and the ibfd in one embodiment the track connector 46 defines interface edges 48 at its opposite ends that are configured to conform to wall 38 in the inferior endplate 14 see fig6 b the track connector may also include end edges 46 a flanking the interface edges that contact wall.