If you get the bird clicker trained you're more than half way there, and birds generally take to clicker training very quickly. Those particular birds have an affinity for shiny things, so painting the parts silver or wrapping them with foil might be one way to prompt the behavior for reinforcement.

edit: for the other half, depositing the parts where you'd like, look up "targeting". I'd train the birds to a colored sticker, then place the sticker on your deposit box gizmo.