Yep, exactly that.
Butyl tape works so freaking good that I stopped waterproofing entirely, which makes maintenance a breeze as well.
Use butyl tape, and run your connectors through the enclosure with epoxy:
You can ride that in a thunderstorm if you don’t use motor sensors.
Also make sure to cover the back (inside of the enclosure side) of the charge port with silicone as well.