Verify all cables are connected to the motherboard including; any power supply cables, SSD cables, and disk drive cables.
Once the SSD is all installed on the tray and plugged in with the SATA cable, it should look neat and tidy.
Using zip-ties to do cable management is a smart way to keep all the cables out of the was and arranged in a clean manner.
Tie up any access cables nice and neat so they don't catch any elements within the PC. Should watch out when cleaning these cables and tying them that they do not interfer with any parts or are in the danger of causing damage to the fan.
Note: Watch out for cables before closing the case and ensure they do not get pinched when putting the sides of the case on.
When closing the door make sure you don't force it and break it, and make sure you slide it with the holes that match up with each other
Clip sides in, and slide to the front of the PC.
Take screws and insert all four into the back of the case and screw hand tight.
Note: These screws should have a circular design on the head of the screw so you can easily screw them in by hand.
(check the BIOS/UEFI).
Connect monitor, keyboard, mouse, and power cables.
Monitor plugged in, and powered on.
Monitor CPU temperature for 10 mins again now that the case is sealed, and ensure it does not rise above an acceptable degrees.
Ensure Disk Drive is the intial booting device, and the SSD is secondary for installing Windows.