Four screws (located just to the inside of the mounting screws for the stand) are removed to gain access to the inside. Once the screws are out, the tray slides easily from the aluminum housing. Of note here is that the tray mounting studs are not centered on this component so it will only install one way. While it can be placed into the housing backwards, one end will be sticking out so it is easy to make sure you assemble it properly.
Two more small screws allow access to the inside of the tray unit. This is the heart of the control panel of the device and also allows you to get you're your hard drive up and running. Just remove the ventilation end cap and slide your SATA drive into place. The slots you can see to along the edges of the bottom plate will be used to secure your drive into place.
Above is a closer look at the PCB used in this product. From this angle you can also see that the hard drive is connected directly into the board and no ribbon cables are used. This will mean less junk to get in the way of air flowing through the unit.