What I did was practise on a few of my own for experience?
You can see were your cable stopper is right?Run the cable threw that and basically wrap it around in the grooves...the cable loops around the handle bar...when you take it apart you should take note so you know how to put back together.
You must shift to the highest gear before you take the rear shifter apart.
The front one you must shift to the lowest gear[smallest chain ring]
In any case I sure do not like em.There to complicated too much work no one I've talked to that has owned them care much for them either?
The old standby friction shifters just keep running along and are inexpensive and easy to replace:confused: