If the screws were long enough to connect the pieces. 8 screws connect the fans to the top of the case, 4 screws connect the bottom of the case to the top of the case. The 3 screws were a bit longer than the rest, I used them to fill 3 of the 4 holes connecting the top and bottom. So I use it as a passively cooled case with no fan and 1 screw is missing. The other screws are not long enough to connect the top to the bottom or the fans to the top. Came without instructions. Most of this would be fairly self-explanatory, except for the important question of which rpi4 headers do I connect the fan to. But it's moot if I can't attach the fans to the case. I'm going to buy another case now.
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