Installation for the LXE is pretty simple. The first step is to find an empty PCI slot and install the controller board into.
Then attach the power cable, desired fan cables, and place the temperature sensors where you’d like them.
Then you can attach the 8-pin connector to the controller board and back panel of the LXE. The two ends of the cables are different; one side has a clip and the other doesn’t. The side with the clip will attach to the back of the device, while the non-clip side will attach to the back panel. The cables only go in one way, so make sure you have them in the right position.
Before you power everything on, make sure to attach the controller board battery. NZXT tells you to install the battery after you install the PCI slot, but it may be easier if you install the battery before you install the controller board in your case.