smol case for the readily available pwm controller modules…
(first make in the uploaded picture used old tolerances; cover should sit flush now)
I recommend using a few drops of superglue to keep the cover on.

for one of these [https://www.amazon.com/dp/B08T5TJWYH](https://www.amazon.com/dp/B08T5TJWYH)
(example)

It's possible to fit the capacitor inbetween the terminal blocks if you bend the leads and resolder it again; If you don't want to modify the model or the module, the available remix has a slot cut out for the capacitor.