Need help. Diy gravity fed ATO

[proudnewbie]

Hey all.
So im in the process of making a diy auto top off.
I picked up a reliance aqua tainer to use as a resevoire.
My question is how to modify as simply as possible to put the water and air lines on. The tank has a tap and air already attached. I have some old tubing from gravel vaccums. But since im not a plumber by any means im not sure of the best way to attach.
Any advice from those who are far more experienced would be awesome