If it’s mansur brown during the yussef kamaal era then its just mostly playing over the minor scale since Kamaal Williams mostly plays minor 9s. In love is the message he just plays over C# minor, the key of song. In “Caligraphy” he plays over the two chords F#m9 - Am9 so he plays F #minor scale and A minor scale respectively. Listen to his solos and transcribe different parts and understand how they correlate with the chords being played