I bought an Atari 5200 that had a missing expansion cover. The 5200 was also stock, meaning that only RF was available. I planned on using the Ultimate Atari Video (UAV) mod on it, using standard RCA connectors and an S-Video connector. The expansion port cover was the best place I could think of to install the connectors.
There are 2 parts here: A blank and one with holes placed in it to use RCA connectors and an S-Video connector (purchased at Console5.com). Print whichever one you need and print with whatever color you'd like. The Atari 5200 case is kind of a dark brownish color, but black should be good enough.
Atari_5200_expansion_cover.stl | 8.8KB | |
Atari_5200_expansion_cover_holes.stl | 61.0KB |