This is a part from an IBM server dated 2008 that I want to reuse in my new computer. It essentially converts from 1 SAS port to 4 SATA ports. I’ll use the raid card to connect to it via SAS, but I do not know what the power port is and what the connector on the top is either
Absolutely this. Save trouble.
If absolutely in need of a backplane, look for old chassis parts from super micro on eBay.