This may seem like a dumb question but what if the file I installed is a folder such as http://leaguecraft.com/skins/4300-ma...sorcerer.xhtml
The file is called 4300 and the closest thing to a Malzahar.dds is Malzahar.skl and Malzahar.skn. In the file there are also MalZaharLoadScreen.dds and MalZahar_TX_CM.dds. This is after I extract them from a .rar file (Malzahar.rar) which I extracted from 4300 (the file that was downloaded). Please help.

Edit: Thanks to SlinkytheDrunk I fixed my problem, turns out it was in the right place but I had the .rar file in the folder too. I guess it's important to trim the file.

@SlinkytheDrunk
Thank you so much and sorry bout asking here, i'm kinda new to this.
Oh and to all those asking for the "true" name of champs you can find it at
C/Riot games/League of legends/game/Heropak_client/Data/Characters You can also find particles, minons e.c.t in the Data file.

P.S Although the Hero_pak does not provide the in game name of the champ (e.g jax is "armsmaster") you can find which name matches a champion because it's skins have the name (in the Armsmaster file there are files such as Jax_pax.skn.