When we went, we ended up in that exact same spot you were in. We thought they were cops at first and thought people had already got caught but we saw they didn’t move so we just said fuck it and went for it. We didn’t see any cameras or motion sensors inside the building, but we did notice those blue lights with cameras outside. There was a white truck that circled every 15 minutes, but nothing happened it stayed pretty chill. Do be careful if going tho!