Ender 2 Controller Fan Mount

Check out the original if you don't want to mess around with tapping threads:
https://www.thingiverse.com/thing:2746330

Same as the original except that the 6 holes for screws are 2.5mm which are suitable for threading with a 3mm tap. Don't get crazy with the screws like you're torquing down the heads on a dragster. Snug is good enough.