Easytether on WRT-1900AC V2

I have a linksys WRT-1900AC V2 that I have installed the latest version of openwrt on. Want I need is directions on how to install easytether on it. I have a GL.iNet mini router that i have installed easytether on and it works great. What I'm unsure of is what easytether package to use and what steps are involved. Any help would be great.

You'll have to cross-compile it from source, as there is no EasyTether package in the Package Table