Two versions - a contour following the shape and a rectangle.

Painted 3MF files for Bambu Studio included. Be sure to position the hole (negative modifier) where you want it. Or drill it later.

I used: Polymaker Aqua Blue PLA, Bambu Lab Magenta PLA, Polymaker PLA PRO Purple

Line with aluminum tape (Amazon) and a 1 meter USB strip (Aliexpress)