FIGS. 4B, 5B, and 6B shows the electronics tray 260 slightly after an initial point of insertion into the receptacle in the frame 210. The state illustrated in FIGS. 4B, 5B, and 6B represents the point of first or initial contact between the leading edge 266 of the electronics tray 260 and the front edge 226 of divider wall 220. The points of contact between the leading edge 266 of tray 260 and the front edge 226 of divider wall 220 are indicated by contact zones 290 and 291 in FIGS. 4B, 5B, and 6B. Those portions of the leading edge 266 that are closer to the center point 229 than the contact zones 290 and 291 have not yet made contact with the front edge 226, while those portions of the leading edge 266 that are farther from the center 229 than the contract zones 290 and 291 have already passed under the front edge 226. In this state, portions of the frame 261 have passed under the divider wall 220, as indicated by the regions of contact or overlap 276. These regions of contact/overlap 276 correspond to regions located between the lateral edges 222 and 224 of the divider wall 220 and the contact zones 290 and 291. At this initial point of insertion, the contact zones 290 and 291 are notably very close to the lateral edges 222 and 224, and thus the regions of contact or overlap 276 are small. The remaining portion of front edge 266 not in the regions of contact 276 is still in the region of no contact or overlap 275. In some implementations, the guide structures described above, such as guide tabs 263 and 264 may assist with the engagement of the electronics tray into frame 210. As shown in FIG. 6B, some amount of droop in divider wall 220 still remains but is less than the amount of droop present in FIG. 6A. The contact between the tray 260 and the divider wall 220 at the contact zones 290 and 291 reduces the amount of droop because the tray 260 now supports a portion of the front edge 226 of the divider wall 220, and thus the portion of the front edge 226 that is unsupported is shorter than it previously was.