Just a totally unrelated side note about the Silverstone DS380 (maybe applies to the CS380 as well)
When you look up many older builds, pictures, reviews, videos etc. it shows the backplane being powered by 2x Molex connectors. (for the 8 HDDs) I believe this has somewhat recently and quietly changed to 1x Molex and 2x SATA Power.
I am considering this case with a Corsair SF450 PSU which has one cable with Molex-only and one with SATA-only. The good thing with this change is that power for the 3,5" HDDs can now easily be split between two cables from the PSU without any adapters - which is a good idea - however getting power to the four 2,5" Slots is more awkward. Likely will use a Molex to 4xSata splitter, that looks like it uses crimped connectors and will be fine for the lower power needs of SSDs and 2,5" HDDs. (DeLock 60142)
I have no idea if there may be old stock around or when this change has actually happened. Maybe order your case first and check before getting any additional or custom cables.