This cabinet is a little more complicated than most, but only has five essential components, a Deep Side, Short Side, Back, Top and Bottom with optional Adjustable Shelves. In KCD, you have control over the Width and Depth, but the Short Side Depth is a calculated field to make sure the clip is always a 45 degree angle.
Just make sure your combination if Width and Depth provide at least a 152mm (6") Short Side Depth, or you may not have any adjustable shelf holes on the Short Side.
If you need a door on this cabinet, you will need to use a negative angle hinge if you are hinging the door on the Deep Side Panel, and the diagonal hinge and plate if you are hinging the door on the Short Side, both hinge options are listed in the "What Hinge and Hinge Plate should I use?" question of the Functional Hardware group on this page.
Here is a quick animation that hopefully will make this cabinets construction and assembly a little clearer.