I assume that the bare armco on the inside of what is normally Turn 12 will be provided with some additional protection for this race. This is barrier will be facing the drivers as they approach the kink that is labelled T9 for this race (where the link track joins the two usual bits of circuit together to form the "oval").
In this photo, it's bottom left and has an access track behind it and then a rock cliff. Drivers go through the slow left/right of T7 / T8 and then accelerate on to the straight. Anyone "doing a Grosjean" at this point will go straight in to a bare armco at 90 degrees. Presumably it'll get a layer of tyres as appears to be used in other parts of the track.