Take the screws out
Go to http://dieselgiant.com/repairyourodometer.htm. There are excellent step-by-step, pictured instructions "How to Repair Your Broken Odometer". Though this applies to 1974-1980 models, I found it...
You need to have the diagnostic computer hooked up to the motor, and have the new inputs adjusted with that.
It is called 'Nindou International' because you can play it in China or the USA.
You need to be more specific.. what car.. model and year?