Nilearn seed based FC and correlation with behavioral scores

Hi,
I have a question regarding the following issue:

I’d like to perform seed based FC on a bunch of images/subjects, but I’d like to correlate the functional connectivity values with a behavioral score (for example, a sum score of a neuropsychological assessment).

In principle I could use the raw seed based FC values and correlate it with a score, but I’m not sure if this is considered “good practice”.

How do I do this in nilearn, is it possible?

Thank you in advance for your input, much appreciated!