Type 2 Cap holder

Type 2 plug caps come standard with many cables and usually just dangle down, bump into the vehicle and annoy the user but you need them from time to time so you don't want to cut them off. This model allows you to easily clip them to the cable. 

Few model variations for different cable diameters that I encountered. Source provided, just change the ‘cable_d’ parameter to generate model for your specific cable diameter.