That soundbar -should work fine. Plug it in and connect the Optical jack OUT of the TV and into the soundbar. It should work. There is a setting in "Menu>Sound" of the TV that will turn the internal speaker off so the sound ONLY comes out the soundbar.
BUT The manual for the TV suggests that the optical out of the TV doesn't change with the volume buttons for the TV remote. They may have changed that depending on the software of the TV.
IF you hook it up via my first suggestion and the volume doesn't change on the soundbar, then your other option is to run a 1/8" cable from the headphone jack of the TV (the manual suggests that there is a 1/8" jack on the side of the TV. I'd check to make sure first. #9.
If it has a headphone jack then you're still ok, run the 1/8" from the TV to the soundbar and the volume buttons definitely WILL work. This is a less glamorous solution but if it works, it works.
When you buy the soundbar from Amazon also buy a 1/8" to 1/8" (male/male) stereo cable like this to connect (not included with the soundbar you showed us.)
https://www.amazon.com/AmazonBasics-3-5mm-Stereo-Audio-Cable/dp/B00NO73MUQ/ref=sr_1_1?ie=UTF8&qid=1478518984&sr=8-1&keywords=1%2F8"+stereo+male+cable
