Configuring API Control Plane with an API-Gateway. According to the documentation:
https://documentation.softwareag.com/wco/11.0.0/en/webhelp/wco-webhelp/#page/wco-webhelp%2Fta-connect_apigw_installer_apicp.html%23

The way to connect to the Control Plane is to edit the custom_wrapper.conf

wrapper.java.additional.306=-Dapigw_cp_agentConfig_enabled=true
wrapper.java.additional.307=-Dapigw_cp_agentConfig_runtimeConfig_runtimeName=demo-props
wrapper.java.additional.308=-Dapigw_cp_agentConfig_controlPlaneConfig_controlPlaneURL=http://localhost:81/
wrapper.java.additional.309=-Dapigw_cp_agentConfig_controlPlaneConfig_username=
wrapper.java.additional.310=-Dapigw_cp_agentConfig_controlPlaneConfig_password=
wrapper.java.additional.311=-Dapigw_cp_agentConfig_runtimeConfig_description="My test description"

Please update the documentation to state:

• Editing the custom_wrapper.conf will not allow you to make changes via the GUI
• Show how to connect to the control plane via the GUI