For the MX-1, I am not sure about EX or MX-2 and I only use the 120 charge:
Use the standard charger included in the stand that comes with the bike
Generally nothing will happen until you power the bike on, so connect everything then power on the bike and it will detect the charger and go to blue led (on the mx-1 at least)
Blue will stay on until charged or you unplug the charger you can monitor with the phone and change some limits if you like
Bike will go to idle mode (flashing red on mx-1) you can power it down before you disconnect
It is a pretty smart system and is hard to screw up
HTH