The last step is routing your Hydration line. There are many ways to do this. I personally like to run it along side the bike, below the seat and across the tank to my leg. I've seen some people run it on the outside of their leg. I personally don't like to do it that way as it make getting on and off the bike more difficult. I also like to put a rubber band around the hose near the top then clip my rectractable lanyard to it then attach the Lanyard to one of my tank Bag zippers