2 things you should know: 1. The optical drive SATA port is slower than the main hard drive SATA port. So if you put a drive in that optical bay it will run slower. Makes it kind of a waste of money to put an SSD in there that will not run at full speed.
2. A drive in that bay will not be bootable and cannot be the operating system disk. The only use of it is to add a big storage type hard drive.
If this is "the Answer" please click "Accept as Solution" to help others find it.