Overhang underneath the North face of the Eastern hill, 20m to the east of blue n°31. Sitstart without a crash-pad at the bottom of the overhang, reach a good hold and climb the overhang and exit directly on the large slab.
From the Mont Sarrasin car park, follow the main path north for 250m, then take the path on the left marked "chemin rural n°24 derrière le mont sarrasin" for around a hundred metres, the problems are on the back of a large boulder clearly visible on the left.