Well, the answer is relatively simple. Wireless connection is not possible, as Connect can only be connected via Cinch. But it would be possible to use a separate product for the sound. I did something like this for our outdoor whirlpool, as Connect is not suitable for outdoor use. I can't recommend a product for this, as I only need the sound here. You want to use SwisscomTV. There can certainly be latencies here with sound and picture. For this reason, I would rather try to connect Connect directly to SwisscomTV, especially since Connect can also be connected to the network... But whether this prevents latencies I don't know....

Unfortunately, as the owner of such a fine device, I cannot answer this question. If you don't get any answers here: Check out Sonos support via their website. They have about the best support on this planet and they are really interested in you being happy with the product. Maybe they know a solution.