Open the form's Connect → Integrations and pick the Make.com sub-tab.
Toggle on Enable Make.com Integration.
Paste the URL of your endpoint.
Click Test Webhook to confirm the endpoint is reachable before any real submission arrives.
Save the configuration.
Every submission POSTs a JSON body containing: campaign_id (the form slug), campaign_name (the form name), each answer keyed by the step's question text (with special remapping for fields flagged as name, email, phone, or postcode), utm_source, utm_medium, utm_campaign, utm_content, utm_term, utm_referrer, county, town, street, and created_at.
Your endpoint should respond with a 2xx status within a few seconds. Slow or failing endpoints cause re-sends to fail too. You will see that in the row action buttons on the leads table.