I bought a HDD SEAGATE 15K.5 300GB. I have a MB that supports SAS HDDs and came with 4 SAS/SATA cables but as you can see in the picture below the connectors for the power and data are "linked" together, so I cannot simply use those cables. What kind of connector I need to connect this HDD?
this hdd is made for RAID cages. you secure the drive to the tray and it slides in and connects to the backplane. some modern cases have them built in, or you could look for a cage somewhere, but its not a desktop product so that's why its not designed to fit in a desktop.