This print is a small case to house a Shelly RGBW2 Wi-Fi LED Controller. It includes a cutout for a DC barrel plug jack and holes for thread heat set inserts. See the links below for the items used. I wired the DC jack to the Shelly for power, and ran the ribbon cable for the LEDs through the small slot in the case.

The various tabs prevent the Shelly from rattling within the case.

DC Power Jack - https://www.amazon.com/gp/product/B098K32L4B

Inserts - https://www.amazon.com/gp/product/B09Z1VXD9X

Screws - https://www.amazon.com/gp/product/B07TK93DCX