6-90V 15A PWM Speed Controller Enclosure

This is an enclosure for a very common Chinese speed controller you can find everywhere on the internet. There are a few different cheap speed controllers out there, this one comes up under the name "6V-90V 15A PWM DC speed controller" often. I bought the one I'm using about 6 years ago, it had a blue board, current models look to be green more often but it is the exact same layout looking at it.

There's a spot for a SPST on/off switch with small alignment nub, the control potentiometer, and