Hope this helps.
Stereo speaker and air-conditioner grilles are part of the bulkhead and headliner fabrics, which include tans, browns, parchments, and meshes. Hi-hat and indirect fixtures provide light. The sun comes in through the deck hatch forward, numerous portholes, and a pair of skylights that are fitted with fillers to match the headliner. Along with curtains and blinds for the ports and deck hatch, you can black out the interior. Another pair of fillers in the headliner reveal access to the windshield wiper motors. These are a service necessity some builders neglect. I mean, how would you feel if you asked the yard to repair a wiper and they handed you back a bill for upholstery work, too?