Second disk cable?

Hello guys!

I have a MAC Mini 2011 Mid i5 2.3ghz

A1347 Seri no:C0*******XXX

I already changed my ram up to 8gigs

Already changed my hard drive up to 7200RPM

But still I'm not feeling like I'm using MAC.

I decided to buy a new SSD but I want to use SSD + my old hard drive.

2 drive is fit this body, also motherboard have 2 HDD conections.

But I only have 1 HDD cable.

I know there is 2 different HDD cable (upper/lower).

Which one I should buy? And what is order code?

I ask a lot of services in Turkey but some of them have no idea about 2 drives??

I couldn't find "definite answer"

Thanks and sorry my for my English.

<Edited by Host>