"How do I get my TV, Sky/ Cable, VCR, etc, sound to come out of all the speakers on my Home Theatre System?
Please connect phono leads (Red, White cables) from the AUDIO IN on the HTS to the AUDIO OUT on the TV, Sky, etc. Once connected switch the HTS onto AUX channel. (you may need to press the button more than once as there's a possibility of two connections, AUX 1, AUX 2)."
I fetched the manual from the same link and it appears to support audio return channel on page 23. BUT this is never a sure thing. I don't see any optical connections so the Red, White cables may be the only solution.