Pay attention to the wall generation setting. For the proper slicing it must be set to arachne.

Up/down angled version: https://makerworld.com/en/models/1295369-angled-usb-type-c-plug-up-down#profileId-1326543

Assembly tips:

• put a wire through the cover part
• perform cable soldering
• plug the plug into the body part
• get the cover part as close to the body part as possible
• put PVA glue into the body part. Having a bit of extra glue in there is actually beneficial. When you connect two parts together the glue will be pressed deep into both parts and make connection more reliable
• connect two parts together and hold for 30 seconds
• done

P.S. feel free to request models in a different format.