How do I - connect a field from another object in a view?

I am attempting to make a table view which shows a project and it's status. That is working fine.

However, I would like to pull in a field in this table view that is from another object which I have connected. The other field is for an ETA date and the other object is Ship Schedules.

I can see the other object via a connection and I can choose the field to add to my table. It shows but no data is showing up. Do I have the connection set wrong? Is the unique identifier not working correctly for it to know what to pull in?

Basically it should read like if X = 950 then pull in ETA for 950.

any help is appreciated!