You can add a cartridge group using the CLI tool, REST API or the Private PaaS Console as shown below:
Sample cartridge group JSON
{ "name": "keymanager-gw-manager-gw-worker", "cartridges": [ "wso2am-190-gw-manager", "wso2am-190-gw-worker", "wso2am-190-km" ], "dependencies": { "terminationBehaviour": "terminate-none" } }