SSD to laptop's original storage place or as ODD replacement (caddy)?

[lolman_fin]

I have a laptop with 1TB SSHD default storage. I also have an optical drive which I almost never use. I found out that I can replace the optical drive with a HDD/SSD caddy, it uses the optical drive's SATA (III?) connection to SSD or HDD. I want to use an SSD to make the computer boot and work faster, SSHD I intend to use as an extra storage only.

I bought the caddy and will buy a 120GB or 240GB SSD which I intend to install Windows 10 to. I was wondering if the caddy bottlenecks the SSD somehow. Do I get more out of it if I place the SSD to the original place and the old SSHD to the new caddy? Assuming that it supports SSHD nevertheless the description didn't mention a thing about SSHD, only SSD and HDD.

Edit: I'm not entirely sure if the optical drive's SATA connection is SATA III, with Intel Rapid Storage Techonology software I can see that the SATA-transfer's speed is only 1.5Gb/s while it shows a 6.0Gb/s transfer speed to the SSHD. I'm not entirely sure how this works, could the connector support SATA III (6.0Gb/s) but the current ODD only SATA I?

 

[popatim]

The optical drive bay sata port is often sata1 or 2 and better fit for the HDD then an SSD, as you're seeing.
Sata 1 is still fine for a slow 2.5" HDD anyways.