How do you get event-inventory's location in the inventory open event?

[Felnstaren]

Title basically explains the question. How would I get the location of the opened inventory in the "on inventory open" event? (People who have never touched spigot, what I mean is the location of the block that owns the opened inventory)

Example of what i'm looking for:

on inventory open:
 send "inventory"

 if event-inventory's name is "Tier I":
  send "Tier I"
  send "%event-inventory's-location%"
  make console execute command "/setblock %event-inventory's location% minecraft:chest 2 replace {LootTable:'chests/simple_dungeon'}"

Note: %event-location% and %location% only return the player's location. I also need it to return a raw xyz location for the command to work, so the command should look more like
"/setblock %event-inventory's-x-location% %event-inventory's-y-location% %event-inventory's-z-location% chest"

If someone knows how to set blocks using json tags ({LootTable:'chests/simple_dungeon'} in particular) using skript instead of using commands, that would be sufficient as well.

 

[TPGamesNL]

Maybe try using the targeted block of player (or blocks around it to deal with lag), and check if those blocks inventory is the event-inventory
EDIT: Inventory holder could also return the block:

(I know this is from Spigot but Skript probably uses this method)
EDIT 2: seems that this will be available & working in the next release: https://github.com/SkriptLang/Skript/commit/3a2b0fccd31af904e9708438fd3106ff95103ae4