4x ~8mm M3 screws, cap head or pan head.
Zip ties to mount to pole. I modeled this for the harbor freight 3/16" width zip ties.
Designed for the 150x100x50mm enclosure, but I believe the hole pattern is relatively universal! Included STL is made for a 2"/50mm pole, but feel free to clone the onshape model below and modify to fit your needs.
The author marked this model as their own original creation.