Embodiments of an optical fiber splice tray assembly for attachment to a backplane are disclosed. In an embodiment, an optical fiber splice tray assembly includes a primary tray having a primary tray base, fiber retention means for retaining optical fiber against the primary tray base, fiber splice accommodation means, first attachment means for attaching the primary tray to the backplane, and second attachment means for attaching a secondary tray having a secondary tray base, to the primary tray, wherein the secondary tray is attached indirectly to the backplane via the primary tray using the second attachment means.