Air Intake Piece Missing

This little tube hanging down from the air intake lines has fallen off. I can't imagine that this is optimal for performance. This part is discontinued and I don't see if on similar year Legacy's. Does anyone have a suggestion for plugging this? And does anyone know why the Baja has this tube thing? Thanks (-:

https://preview.redd.it/697d6obpedze1.png?width=615&format=png&auto=webp&s=3bcebe904a45e3ab3479ef15ccec417037744c7f