Your LX has to have the factory amp for this to work. If you have one, there will be a black box with fins on it under the drivers seat. I'm pretty sure the connectors are the same as long as the amp is there. The basic radio has a 14-pin connector and the 6-disc has a 24-pin connector, but I'm not sure what an LX with an amp has.
If you don't have an amp and you want to sell the 6-disc, PM me. I have a single CD with an amp, so the 6-disc should plug in.