Rotate it horizontal so it’s not tall/thin.
Structurally the print will be strongest in the XY plane as the filament is continuous. Along Z there are filament layer boundaries and will be 30-50% weaker.
This looks to be a case part of some kind, you would want the strength to be along the long axes, so orient it with the large flat area down.
If that orientation introduces any unsupported overhangs then you will need to add support.
This should be a negative indentation (about .2mm indented, perhaps), not embossed. This becomes unprintable in the flat orientation.
You’ll notice that bottom hole renders with no thickness in the github viewer. That indicates this model is non-manifold and has “deal-breaker” levels of triangulation errors. I ran this through a geometry checker and got this:
You need to figure out what’s going on with your CAD package to be able to export a quality model, as this is not guaranteed to slice and print at all.
These artifacts at the bottom also aren’t good, something exported weird here:
While you’re editing this model, make sure there are no features smaller than 1.2x your nozzle diameter or they will not print either (in this case, 0.48mm). It looks like this is very thin in some spots, so the slicer will ignore areas thinner than can be printed.