Display Custom Taxonomy on Custom Post Type

I have a Custom Post Type created titled "staff" and I have a custom Taxonomy created titled "Departments" where I can specify the "category" for the staff member.

However, when creating a new entry or "staff member", I do not see the taxonomy I created called "Departments" listed on the sidebar for me to classify the staff member.

How do I associate that taxonomy with that CPT and make it display on the backend so I can select the correct department for said staff member?