Hi, I have tried copying and moving a lot of files according to various guides but none of them worked for me. I know the exact steam hki file that is being used but don't know where to paste it for voobly wk.

Help is appreciated.

Normally the WK installer options for hotkeys should do that for you automatically.

If that doesn't work for some reason: You can either place the hotkey file directly in the main Age of Empires II Folder (/Age2HD if using the compatibility patch) if you want to use it for regular aoc and wk both.
If you want to use it for just WK, place it in \Voobly Mods\AOC\Data Mods\WololoKingdoms

You need to make sure that it has the right number for X in playerX.hki though. The easiest way to check this is to open a game of WK in single player mode through a voobly lobby and edit some of the hotkeys. You should see a .hki file with a recent "last modified" date in the folder then. This is the one you need to replace.