Video Scout.
I think Sidy is best thought of as similar to Sochan, as a power wing (rather than big forward / Small ball centre) who works as a connective passer with some off the dribble juice, and has the physicality to contest on the outside and defend a range of positions.
Obviously, the shot is the big question and if he can't shoot consistently it's hard for him to fit in, but that's a development question.
Think it's fairly obvious that the Spurs weren't incredibly high on him (as in, a top 20 grade), given the trade at 33.