The KL03 features almost no toolless features, so have you screwdriver ready, as most step requires the use of it. Power supply and motherboard are installed as in any ordinary case, not much room for cable routing left, so you have to find a way to hide them somewhere in an empty 5.25” bay.
The Optical drives and 3.5” devices (not HDDs) can be installed without the use of your screwdriver as the case’s goodie bag comes with a series of drive rails:
The drive rails click in place and then you slide the device until you hear in it snap lock tight:
If you have half length 5.25” devices, like fan controller or LED display, you can use the screws provided.
The star of the show in case of the KL03 is the hard drive mounting system; it features hot plug and play SATA data/power all-in-one preinstalled cable (or cables if you purchase extra units). You can see a single one installed in the photo below:
You screw your hard drives into the HDD plastic mini racks:
Then you just slide them in and close the rack cover, which fixes them in place, then you reinstall the front 120mm fan and you’re good to go!