I think the one you're referring to is the choral section of "Cockeye's Song", which features the OUATIA Main Theme mixed with vocals by Edda. I'm sure the exact location of it in the track, though. Shades is right about the credits music.
Yes, that's the one, I have that song, but I'm looking for the exact take that was used for the finale and doesn't have Cockeye's Song attached to it...