A Converter only charges your batteries and provides 12v power for 12v appliances and systems. It is not an inverter and does not invert 12v to 110v power.
Most likely your TV/CD/Radio are all 12v appliances.
Generally, the converter is behind the 12v fuse panel, but not always. If yours is back there you probably just need to unscrew the fuse panel cover. But it's hard to say.
You do not HAVE to remove the converter if you add an inverter. Some inverters are also chargers and others are not. It is less expensive to buy an inverter without a charger - but generally the charger in a inverter/charger will be a smarter more programmable charger than the charger in your converter.
Solar power on an RV is covered in a zillion threads and YouTube videos out there on the internet. The subject is well covered on iRV2 Forums
. It's not a Winnebago specific subject so the info there would apply to your TT.
Search YouTube for RV Solar Install and you'll get hundreds if not thousands of videos suggested - some may be right on target for you.
Your complete Operator's Manual is available on www.winnebagoind.com
. I'll post a link to yours below: