Projectbaseline EC outport issue

Hi Experts,

I have the following question. I created some simple custom object with project UUID as an alternative key that has two fields cost center ID and cost center name and I am showing them in the Project Screen

When creating a new baseline of the project I would like to save the current cost centers in the Projectbaseline BO as well (as another node in the custom BO or using another BO where ProjectbaselineUUID is an alternative key), however, the problem is I cannot show the particular set of cost centers(custom BO) in the Project Baseline OIF screen as it doesn't support ProjectbaselineUUID as a key only ProjectUUID or TaskUUID and this is not enough to have the specific set of the cost centers for that particular baseline as project has multiple baselines:

What suggestions do you have guys?

Thanks!