Unknown ruins near old city

On saturday, I visited some ruins on a hill that over looks the road by the south part of the walls of the old city.   There are no markings of this site there or on the maps. Map here

Its directly above the yellow street which turns into a sharp bend.  Up here is interesting remains of an archway of a building set into the side of the hill towards the old city.   You can go underneath this archway (I didn’t as it was very steep) and there are caves underneath that been using for dwelling of some kind.  Below this hill there are trees as I have seen an Arab shepherd leading his flock of goats across before.

To the top of this arch is a big hole in the ground where someone has thrown the wrecked remains of a truck.

I am not sure the origins or age of this site, would appreciate if someone who knows wishes to comment.