Connecting Soundbar to TV

[aschams]

I purchased a Samsung soundbar that has AUX, Digital Optical Audio in, bluetooth and USB. The only way I'm able to connect it to my TV is with Coax. (TV Model #: EW50T5KW)

What do I need to purchase to connect Coax to one of the above options?

 

[dudio]

You can get an adapter like *THIS* .