Here's my setup with the cheap Amazon terminals mentioned way back by the original poster. Still seems a bit messy, but better than before.
I've had these for over a year and have held up well, but the fit to the battery terminals is not great.
Anyone know of a good cover/flap that can be cut to a custom shape? I maybe know a guy who shorted out a battery with a wrench one time.
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Hey! If you're still interested, I just finished the my design for covers for these terminals (working with @ClassyJalopy). See photos below! It comes covering everything, however, it has slits in it to make it super easy to trim whatever openings you need:
Like my other cover designs, it's meant to be held in place on the terminal via a ziptie:
Here you can see how it 'hooks' around the perimeter underneath:
It 'flaps' open nicely to let you access the terminal:
And here is a better shot of the premade 'slits' that go down the sides and the front. This material is tough/flexible, but cuts nicely with a sharp utility knife or sidecutters:
Positive cover alone is $25 shipped to your door, or positive + negative set (negative printed in black) is $40.