You need to:
1-create a process with an Edit rule using your BO as input.
2-start the process with something like this:
<button type="button" class="btn btn-link"onclick="AwareApp.startProcess2('ProcessName','{BO}',{ID},'main')">
uncheck default edit operation since you want the button to start the process.
note: i am using bootstrap to display
class="btn btn-link"