connecting wifi to a TV (Sony) SMART

Hola @Greenhats, I'm assuming you are trying to make a wireless connection. I have a TCL Roku TV. Every smart TV is a bit different, but in my case the setup is Settings > Network > Set Up Connection > Wireless.  It will then scan for available networks.  Once you choose the "T-Mobile" network you would enter your network passkey. It should then connect to your network.  Are you getting an error message after entering your passkey?  There wouldn't be anything that needs connecting to the back of your TV, unless you are making a wired connection (Ethernet).