The holes should be drilled in the pre-molded locations as pictured below. 2. Remove the round cap on the grill top 3. Route the plug end of the AC adapter through the round opening and plug into the underside of the Ultra. 4. Place round cap with slot on the grill top. 5. Plug the AC adapter into the 120V AC wall outlet. 6. Follow the Operation Settings. 7. Remove the wall or ceiling register and replace with the Ultra. Note: If you choose to hard wire the Ultra, install the necessary 12