This is just the board to assist with hole mounting placement. If you make a more detailed version please comment below.
AC to DC Precision Buck Power Supply Module AC 120V 100V-264V to 12V 2A 2000mA Isolated Step Down DC Module (12V 2A) Green
https://www.amazon.com/gp/product/B07FNFJTHH/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
There is something wrong with your step file. It won't download. Can you reupload it?
The 3d file is wrong
How so? Please try and be more specific with your comments in the future.