Prior to placing the PSU in the case, decide which cables you will need. My setup is pretty simple, all I need in addition to the pair of PCI-E cables and 24-pin cable is one Molex cable, one SATA power cable, and the 8-pin ATX12v cable. I also placed the 8-pin/6-pin PCI-E adapters on the PCI-E cables.
I felt that the PCI-E cables were too short, both the attached cables and the modular cables. They were fine for running the cables in the case, but far too short to try to hide them as I have with the power supplies I previously have had in my test rig. Adding the adapters did make the attached cables long enough to hide.
It is nice having a modular power supply for a change, the last couple of power supplies I've had in my test rig weren't modular.
While I was at it, I decided to go ahead and hook up the ESA cables. There is a 4-pin floppy styled cable permanently attached, it connects to the case ESA module. There is also a USB cable permanently attached, intended to connect to a USB connector on your motherboard. Since all ESA components connect this way, eating up three USB connectors, Thermaltake thoughtfully added a shielded cable giving you the option to connect the PSU via one of your external USB ports.
Open up one of the unused PCI expansion slots, and place the cable's PCI bracket in the slot. Connect the 4-pin USB connector from the PSU to the adapter end of the USB cable, and plug the other end into an unused l/O USB port.
I ended up with a very clean build, though if I had needed 8-pin PCI-E connectors, or had added a second video card, the build would have looked much different with PCI-E cables running through the case.