"[MEGA] 1.1.6 SaltySD EUR and USA" Google that without quotes and try to find the download. If my memory serves me then you'll get a SaltySD folder and a cia. Install cia and put folder on root.
Also as long as you have luma which you should also refer to this post:
https://gbatemp.net/threads/smash-selector.431245/#post-6455755 IT'S SO CONVENIENT FOR SMASH! Basically it automatically can switch between every modpack including original smash with literally a few clicks and it's in cia form! So straight from 3ds