Keystone doesn't offer a 3D walkthrough of this model... but I did come across
a sales video [LINK] where the salesman points out that the front TV is an option and you have to "pay attention to your build sheet."
He shows the TV area at around 3:00. I see two outlet plates flanking the bottom of the blinds, but no details. If you're missing those plates, tis may be your build-sheet issue.
If not, I'd advise looking behind the stereo. There's usually a faceplate that pops off, and four screws, and then you can dig around back there and look for a coax connector from the wall.
Other than these observations, I am out of suggestions.