In Enterprise Guide, if you go to [pre]
Help --> SAS Enterprise Guide Help
click on the Search tab and then type
"Regression Methods" PLS
into the Search field
then, click Display
One of the hits that comes up, should be entitled "Regression Methods" with a location of SAS System Documentation. If you open that topic, you will see that it is a description of how the score vector is calculated, depending on your different models and methods.