the tidier solution
...is definitely the use of this kind of cables
Unfortunately it's hard to find them, especially for a reasonable price.
There is also a similar build from DELL
No issue with splitters.
Nice and tight fit of both, the SATA and the power cable, on the drive.
Only the price is an issue. Got some of the DELL cables from the china guy through ebay but you have to
take care, by default he charges for express shipping (per cable)!
Next thing you can do to avoid splitters is adding some SATA connectors
on that cables.
I did this because I found the gap between two connectors was too big and there was too much
cabling mess. So I removed the connectors from some spare cables I had (looked pretty much like those on
above site) and crimped them between two existing connectors.