Multiple Relationship for slicer calender

 Something  Like this.

Basically, I need a slicer visual that has the filter option for business unit and year.  Because there is a active relationship betweent the business units columns in the 2 tables, when I a select one business unit, both the charts display the accurate values. But since I cannot create another relationship between the years column,  when I select a particulr year from the slicer drop down, it only shows  accurate value for one of the charts.  Like how would  I create  second active relationiopship in two different columns from different table that does not have one to one relationship.