HUD Modal Button Bindings

I can create a Modal HUD, make buttons, and respond to button clock events in verse abd through devices. My question pertains to the shortcuts attached to buttons on built in HUDs. For example, if a HUD had multiple buttons, one button you can press by using ‘E’, another ‘Q’, without having to move your mouse.

I am wondering how i can add the shortcut bindings on my HUD buttons?