Common configuration steps for all b+s Components
Enable the Integration API in the b+s Configuration record in use. (Enable Integration API).
Create a Lightning Message Channel (LMC) in your org and update the component source code to reference it. See Create a Lightning Message Channel. Replace [REPLACE WITH LIGHTNING MESSAGE CHANNEL] in each component's JavaScript file with your LMC name (e.g., msgChannel__c). You only need one LMC for all components.
Register the LMC in b+s Configuration | Integrations | Configure Messaging Channelref.