I see you have already been linked the manual for the laptop. If this was not the case you can use
wmic bios get serialnumber which will return your laptops serial number which you can then put into most manufacturers websites to get exact specifications and support for your specific product. I have recently learned that this command
DOES NOT work with servers only works with OEM devices, so anyone reading should note that.
Looking at the diagram from the manual, it looks to me like you have two slots, but on top of eachother as opposed to adjacent. Here's a picture of what I mean, in any case it should be straightforward to open the laptop up and check. http://cdn.makeuseof.com/wp-content/uploads/2013/04/Upgrade-Laptop-RAM.png
I would think that armed with the serial number, you can check specs on the manufacturers website, and checking for dimm slots is straightforward. Once you know you're buying the right thing, installing is as easy as playing with lego.
Another thing to note are that RAM supposedly works better when you have 2 same brand (preferably same batch) sticks. So that's something to think about, although i've never thrown away decent RAM on behalf of it.
Hope some of this was helpful!