I think you should email your question to Tommy Dzurak at Aural Symphonics. He needs to know about these issues and will be happy to help you to make the right connections.
I also purchased the Optimism emm cables. There was an instruction sheet that came with the cables which outlined how to connect the cables. However, I also had a hard time making the proper connections, and initially they did not work. I thought I had damaged the cables. I took them out, started over and eventually got it work. Did the cables make a significant and worthwhile difference to my DCC2/CDSD? Absolutely, with the result being a even lower noise floor, more dynamics, and air. I would not thought it possible, but to paraphrase some other audiophile, there is always better.