New Style Coleman Xtreme 5??

I bought a Coleman Xtreme 5 (50 qt) cooler from Walmart today was wondering if anyone has built a manifold in one of these? The drain goes out the back and it lies in a sort of rolled shelf inside the cooler which decreases the surface area on the bottom of the cooler and might make it a little tricky to adapt a manifold to the outlet hole. Not sure if I should take it back and try another or if anyone else has given this a shot already.

Always hear a lot of talk about these coolers but all the pics I've seen are not like the one I bought.