In Peliqan, go to Connections, find the Data Warehouse tile and copy/paste all connection details:

Use these settings in Metabase to connect:

• Connection type: Postgres (default data warehouse type in Peliqan)
• Host: db.eu.peliqan.io (for EU instance)
• Port: 5432 (for Postgres)
• User name & password: copy / paste from the Data Warehouse Connection tile (see above)
• Database name: same as the user name
• SSL: enabled