If you know the URL of the server and the name of the coverage to which you want to connect, you can use the model decoder to create a WCS model: 

static ILcdModel createWCSModelFromString(ILcyLucyEnv aLucyEnv) throws IOException {
  String serverName = "https://sampleservices.luciad.com/wcs";
  String coverageName = "92c09725-a9c5-46fb-bffd-d9e23b4abbf2";
  //The source name passed to the model decoder should include the server
  //and the coverage name
  String sourceName = serverName + "?data=" + coverageName;

  //Create a composite model decoder based on the decoders registered on the back-end
  TLcyCompositeModelDecoder modelDecoder = new TLcyCompositeModelDecoder(aLucyEnv);
  if (modelDecoder.canDecodeSource(sourceName)) {
    return modelDecoder.decode(sourceName);
  }
  return null;
}

or using an ILcdDataSource: 

static ILcdModel createWCSModelFromDataSource(ILcyLucyEnv aLucyEnv) throws IOException {
  String serverName = "https://sampleservices.luciad.com/wcs";
  String coverageName = "92c09725-a9c5-46fb-bffd-d9e23b4abbf2";
  //Create a data source
  TLcdWCSDataSource dataSource = TLcdWCSDataSource.newBuilder()
                                                  .uri(serverName)
                                                  .coverageName(coverageName)
                                                  .build();

  //Create a composite model decoder based on the decoders registered on the back-end
  TLcyCompositeModelDecoder modelDecoder = new TLcyCompositeModelDecoder(aLucyEnv);
  if (modelDecoder.canDecodeSource(dataSource)) {
    return modelDecoder.decodeSource(dataSource);
  }
  return null;
}