Remixed to fit MC4EX connector, which is slightly smaller than a regular MC4. Take a look at the pics to see an example. I recommend printing in Nylon or PETG.

I also added a hole so you can put a key ring on it, and clip to a carabiner or key chain in the field.

Print instructions

Print Settings

Printer Brand: Creality

Printer: CR-10S

Rafts: No

Supports: No

Resolution: .20

Infill: 25% or more

Filament: Any PETG, Nylon Any