Ability to have more than one rating model for Performance Rating within Profile Talent Ratings

Summary:

Hi experts, we currently have a client that has two business units in which they each have their own overall performance rating model from their evaluations. We want to have their worker's performance rating updated onto their talent profile upon completion of their performance documents (even though different rating models are used for different performance documents). However, it seems that for the "Performance Rating" of the Profile Talent Ratings, only one Rating Model can be associated to it.

How do we go about the other worker's performance ratings being updated onto their talent profile for those who utilize a different rating model?