See the beta photo for location as well! This wall is literally in the same area as the Toni Harp wall, just around the corner, more towards the inside corner of the larger walls. The flake is very obvious. Basically climb up the large blocks until you see the giant flake.
Tree is the downclimb, very sturdy and has large knots to use as holds.
One pad was enough, but two are recommended, along with a spotter, because the first move to the pinch could easily result in sliding down the starting bloc...