You will need to get one straight (180deg) barb fitting and one right angle (90deg) barb fitting to replace the 2 compression fittings supplied in the kit.
Your local auto parts store should stock it, if not a place like Summit Racing should have it.
Install the sensor into the manifold along with the 2 barbs.
Now cut the hose going TO the cooler (not from the cooler) just past the U where it leaves the hard pipe.
The right angle barb side of the manifold attaches to this U hose with the barb facing down.
The barb on the other side of the manifold should face forward so the hose can run past the driver's side of the radiator and to the new cooler.
The return hose from the new cooler attaches to the other side of the hose you first cut using the barb coupler that should have come in the cooler kit.
I then tie-wrapped the manifold to a bracket used for the hard trans fluid pipes (just above the first splice).
I'll snap some photos of the setup when I get a chance.