how to install SDD for inspiron 2350?

Hi. I have an inspiron 2350 all in one. Does anyone know what kind of interface is for the 2.5 inch HDD? I bought a 2.5 inch 1T SSD with SATA3 trying to replace the HDD. But seems it does not match the HDD's interface and I can not just slide the SSD in. Dell's manual says the HDD is SATA, so it should be ok to use a SATA3 ssd.  Does anyone know how to fit the SSD in HDD's slot? Do i have to use some kind of cable? Thank you.