I've been using this type of protection for my lipo battery connectors for years.
I decided to publish it because I haven't seen many solutions that indicate the battery charge level.
This model is made of TPU and requires manual filament changes.
I've included a pause in the print to change the filament, as common TPU isn't supported by AMS.
When the print pauses, look for the "extruder" option on your printer's screen and proceed with changing the filament.
Once you've changed the filament, finish your print.
The gif shows the minimum material consumption.
I loaded 4 connectors to account for the pause time, but you're free to print as many as you like.