How to add data to your Lightspeed map at Lucy start-up explains how you can use the configuration files to define which data is loaded when a new map is created.
To specify a WMS layer, you can use a String of the following form:
${server_address}?data=${coverage_name}For example:
https://sampleservices.luciad.com/wms?data=92c09725-a9c5-46fb-bffd-d9e23b4abbf2