XT-30 cap
thingiverse
Here are some color-coded caps for both XT30 and XT30U connectors. It's a good idea to print them in distinct colors to make it unmistakably clear which one belongs to each type.
Download Model from thingiverse
With this file you will be able to print XT-30 cap with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on XT-30 cap.