T7810 - Installing a 3.5" hard drive in the 5.25" bay

Hi,

I was wondering what parts I will need to install a 3.5" hard drive in the 5.25" drive bay.  I saw this video: https://www.youtube.com/watch?v=6Dg5wAdBdRo and noticed several parts that I would need for the install.  

The reason is because I used the two hard drive trays on the bottom of the box.  I think this is the only way to install another hard drive, right?

Can someone please tell me what parts I would need?  

Thank you very much!