Enclosure for DROK DC 12V Micro Stereo AMP

I bought this amp https://www.amazon.com/gp/product/B010LRBGGS/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1 to power some basic speakers in my creativity room and wanted an enclosure for it. It's got a hole for a rocker siwtch for power (specifcially this: https://www.amazon.com/gp/product/B00X40G9EO/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1). My deisgn includes mounts of the sides for dropping into the holes in my elephant rack. If requested (you can see the rack in the pictures), I could uplo