adding ssd on new acer v3 722G laptop


Sep 24, 2013
I recently bought the acer v3 772G 9643 notebook and its working perfectly fine
but I am planing to add an ssd as my OS drive and some games (it can put two hard disk drive)
prob the samsung evo 128G or the kingston v300 120G
but when i bought the notebook. It did not come with any extra hard drive tray

1.Do i have to lock the ssd in with the hard disk drive tray when i install it in cus i thought ssd doesnt have moving parts
2.where can i buy the hard disk tray?
3.does this laptop has two SATA 3 conncection? or only the first one?