In the top picture below we can see the slightly taller Sau Ming House on the Sau Mau Ping Estate. The estate was largely demolished in phases throughout the 90's but Sau Ming House remains at the moment. It's handy because it gives us an approximate position of where Payne must have been for this scene and it lines up quite nicely with the hill that now supports the recently constructed On Tat Estate.
Anderson Road quarry at the back
In the lower picture you an see what was once the service road for the reservoir (Sau Mau Ping High Level Salt Water Service Reservoir - located up the slope on the left) but since the construction of the On Tat Estate has become a proper road connecting the estate with Po Lam Road.