https://bitbucket.org/malhan-designs/x301-mods/src/master/Fan Breakout Board Mount/
A simple mount for the LayerFused Dual Power 3d Printer Fan Breakout Board Kit: https://shop.layerfused.com/collections/featured/products/dual-power-3d-printer-fan-breakout-board-24v-12v-5v?aff=2
I use 3M VHB double sided tape to attach it to the electronics box, so I didn't add any screw holes.
The tolerances on this part are very tight, so make sure you have your horizontal expansion and flow dialed in.