Testing, instillation, and adjustment can be done with ease. Basic Evaluation - "If the battery was weak, charge it and perhaps look into why it might be weak. If the battery was bad, replace it. If you charged the battery, re-check it!" Ducati Monster Bike specific regions and close up images shown below:
The images displayed above show a slightly more involved removal process. I was attempting to access the valves beneath the battery. You will not need to get quite so involved with the steps shown in the image. Simply follow what's mentioned below. The battery shown is a slightly more affordable option you can also consider.
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Various images taken from Official Ducati Manual