A Closer Look - Inside
To gain access to the case, you have to remove a few screws and pry the cover with the fan off the chassis.
The interior has been kept rather simple, so that the case can be as small as it is. A slim PCB supplies the power drawn from the external brick to the mainboard via a 24 pin ATX adapter. Turning the chassis upside down, there are the two 2.5" HDD bays, which will end up below the mainboard. You can easily install them after inserting the ITX board, but you may find it troublesome to route the power and data cables properly, thus I suggest you go for these drives first.
All the cables within the ISK-100 are quite ordinary, but are actually rather long. These are probably the shortest that Antec had at their disposal without having to order custom ones just for this chassis. In the end they do work of course.
Before we dive into assembly, there is the power converter. It carries the label "MD-80" along with Antec branding. Looking at the underside, it actually states what the unit is capable of. The single 12V rail can deliver up to 5 Amps, while the entire PCB is made to push 80W at most. So even though the PSU brick is intended for 90W at most, you should not use components that draw more than 80.