Additional assignee list - Project task

[Captain Gaming]

Can anyone tell me the working functionality of additional assignee list for the project task when assignment group is empty and not empty?
In my case there is dictionary override on tsp1_project and that dictionary override will work after executing script include or not?

Reference Qual

javascript:var util = new ProjectManagementUtils(); util.assignedToRefQual(current, SNC.PPMConfig.getProjectRole('user',current.getTableName()),true);