Using either a soft jawed vise or you can wrap the fitting with tape to prevent scratching,thread the big fitting over the outside diameter of the hose. It will stop turning when you have reached bottom. You can also look inside the larger fitting and see where the hose will stop.
Now,LOOSELY put the hose and fitting in a vise,taking care not to scratch it. Mark the braided hose with a Sharpie right where the bottom of the larger fitting and the hose meet. This is just to make sure you aren't pushing the hose out. Take the smaller fitting and liberally coat it with some type of lubricant. Aeroquip make assembly lube or yo can just use silicone spray. Insert the tapered end into the hose/fitting. Screw it in until it bottoms out all the while making sure the hose is not being pushed out. It will get very tight but have patience.
It might sound hard but it's really quite easy. Make sure to wrap the hose with tape when cutting as this will help decrease frayed ends.