How to create a LS-DYNA card shortcut in the main menu using the build menu code

what kind of card are you willing to add a shortcut to?

Have you tried using Ctrl+F and typeing the card name?

https://community.altair.com/community?id=community_blog&sys_id=62734e4a1b31a414c4dfdbd9dc4bcbfa&view_source=searchResult

This will directly create cards into your model.