Accessories and Documentation
Inside the lower five drive bays you will see one of these adapters. Simply screw in your 3.5" device into the tray with screws from the hardware kit. Then take the 5.25" tray and slide it back into the bays from the inside, and either use just the tool-less clips, or replace the four screws sitting in this image that the trays are all shipped with.
In the little white box I found in the Styrofoam, I found this selection of hardware. Galaxis sends five wire management ties, a motherboard speaker, four extra risers, a selection of screws for the expansion slots and power supply, and another assortment of screws for mounting drives and the motherboard.
The instruction sheet is a single page, printed on both sides. This side gives you a wiring pin-out, an included parts checklist, and an expanded drawing of the Atlus chassis. The opposing side gets into more detail of how to use the drive trays and installing devices. Even though the instructions are short and sweet, they do the job, and will get you past any issue you run across in the build.