For my rook I choose the MeanWell LRS-350-24 as powersupply and wanted to mount it to the printer itself. Its fairly simple and the Psu is mounted with 4x M4 8mm screws to the bracket attached to the frame.
For installation :
Mount the bracket onto the Frame first, then attach the Power supply followed by the lid, covering the outputs.
The author marked this model as their own original creation.