Here you are. This is a 105 roadbike crank, but the principle is the same.
Tighten the BB cups making sure you have all the spacers in right. Push the crank through and use teh heel of your hand to get it all teh way through.
Lift up the security tab between the pinchbolts on the end of the NDS crankarm.
and push onto the splined end of the crank.
Seat the preload cap in the threads and start it off by hand
Use the tool (or a 20p piece) to tighten the preload cap
No more than finger tight, checking for play by rocking the crank arm.
As soon as you have eliminated all play, and no more, stop tightening!
Then use a 5mm hex to tighten the pinch bolts half a turn at a time so you don't overstress one side of the pinch
Once you've tightened the pinchbolts the preload cap cannot affect the preload any more.
Finally, push the security tab flat.