I have asked the same question, and received a postive answer from a few people. I have also bought a 6 CD unit and will try the replacement next week. I have a copy of the ST wiring diagrams and the plugs are the same. One connector is for power, lights and speaker outputs, the other connector runs back to the subs if present, I do not have subs on my ST. But the connector is present behind the single disk unit.
Ivan