you can purchase adapters/converters/splitters like the one below.
I have two sata hdd,s and I am uncertain as how to put the connections to them. I have one sata connector on the PSU. and I need to be able to connect the 2nd hdd. I have a sata lead with a white connector (as the std PSU connectors) also the same lead has a Mobo sata plug attatched.it is a 3 way lead so to speak. I dont want to cause any damage to the system, I have always bee a ribbon tape person with the older pcs. Can any forum member give details of wiring two SATA hdds.