I bought this soundbar for a friend recently and we can't seem to connect the tv to the soundbar. He has a hisense ltdn42v77us and it is quite a low budget tv but the only audio out is an orange RCA coaxial one, no optical or even L/R RCA out. The soundbar has two options for connecting to a tv, either optical (which the tv doesn't have) or analogue. The cable which is provided is an auxiliary (which plugs into the bar) to L/R RCA cable (supossed to plug into tv) but the TV does not have the L/R out, just the orange coaxial. What are the options to make this work? We have tried plugging in just one of the RCA but sound only slightly came out the corresponding speaker on one side of the bar. I saw no info on any cable that is Aux male to RCA male. Is there a type of adapter or something we could use?