if you have a manual it will describe it properly.
you need 6mm adapters that screw in holes in the inlet manifolds or inlet rubbers on each carb you have to take out blanking bolts to screw in the adapters then connect the rubber pipes to the tuner,
make sure the bike is normal working temp.
there is a screw between one and two adjust this until one and two are sucking equally, rev it and let it settle and recheck. then do three and four, again there is a screw between three and four.
finally there is a screw in the middle between two and three, this adjusts the two sets together ie 1&2 with 3&4 until all carbs are sucking the same. some bikes are easier than others. hope this helps, chris