Getting under textures in Battle of Ia Drang

[Abchaz]

So yesterday I played in CIA server and someone told me to use hook to get to nowhere. I ended up getting here. Screenshot by Lightshot
The location is in Battle of Ia Drang Map, NVA Camp cave. You can kill people from this place who go through tunnel, so you can just sit here and prevent USA from capping the flag. The grappling hook was thrown somewhere near the hideout to the ground.