Adding Animation Notify to a Bone Socket?

Hi, I have an issue adding a custom notify to a certain bone socket.
You see, if you just add a sound or a particle effect, you can choose a socket you want to attach it to right in its details in a panel on the right. But if you add a custom Notify, that is used in a blueprint, there is no such option whatsoever.
Is there any way to point out a bone I want to add a Notify to?

Here is a screenshot of my animation screen and also my animation blueprint, which is set up to play different sounds on different surfaces.

And if it’s only possible to do within a Blueprint, I would greatly appreciate any suggestion on how to do it, I’m not really good at Blueprint and only followed tutorials to create this one.
Thanks.

Did you ever find an answer to this? I’m currently trying to do exactly the same thing.