I needed some form of protection to cover the poles of a car battery, and since car battery poles have a standard, maybe it can be useful for someone else.
So I drew them in Fusion360 and test printed two pairs.
The prints have positiv and negativ markings, and I made mine in characteristic red and gray.
The print on the pictures is 0.3mm (draft) without supports or brim.
The author hasn't provided the model origin yet.