"Helmet Hook"

[Grumpy Goat]

Our main reason to use the hook is to keep the helmet from falling off the bike, not lock it.
When we need to lock the helmets we use a cable.

Yes, I have a Helmetlok as well as a cable but I put it in the top box as the easiest solution. I would like the hook for the same reason as you ... not to lock it but to secure it for short time and not having it on the sloped seat.