Create a bold stencil-style bearded skull SVG for ventilation on a retainer case lid sized 60.8mm x 49.4mm. IMPORTANT: The entire design must be a SINGLE CONNECTED STENCIL. No floating pieces. No disconnected interior shapes. Nothing should fall out when cut. All enclosed areas must use stencil bridges/tabs connecting them to the main body. Eye sockets, nose, teeth, and beard details must remain connected with bridges. Design it like a laser-cut stencil, not an illustration. Use the beard and facial details as ventilation openings. Keep at least 3mm border around the outside edges. Use clean bold shapes with good airflow and structural strength.

The image shows a black and white drawing of a skull with a beard, set against a white background. The skull has a tattoo-style design, with intricate details and bold lines.