This is a cover for the door handle screws of later MGB models.
You can simply slide them over the end of the door handle.
Rafts:
No
Supports:
Yes
Resolution:
0,16
Infill:
100%
Black
Notes:
To get a surface that matches the rest of the door handle, you have to activate 'Fuzzy Skin' in Cura.
Remove the support and you are done