Approach
Park at Ascu Ski station and start at the lower exit of the parking 🅿️ on GR20 (marked RedWhite). Continue up and down the path for quite some time until you see a bridge (know as passarelle). Do not cross that bridge and continue on the right side of the river up to the already visible wall. The path (and the top of the wall) is also known as Pointe 1693. The path and also the wall can be found on OSM (e.g. Organic Maps).
GPS Location of the wall: 42°23′10.03″N 08°55′22.87″E
Ethic
Park where indicated, take care of the environment, buy the local guidebook when possible (this is one of the ways you can help local route setters), clean up your shoes before climbing, don't spray beta, be polite.