Like so. I put a vent and Camelback adapter on mine also. Run the hose out the tailgate. I made a shorter hose to use on a table top. Each has a shutoff valve.
I use Water Bricks which are 3.5 gallon each and HPDE, BPA free food grade plastic. They're very durable and stack like Lego bricks. they also run about $17 each brand new.