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I assume you are referring to this form? http://www.jotform.com/form/61316782905156
I checked your form and I can see that you have already added an asterisk in the hint example of the configurable list.
Now to make the field required, click on the Configurable list wand icon to open the wizard, then select General. Add an asterisk before the name of the field.
Then to hide that asterisk, go to Custom CSS section of the wizard and inject the css below:
Do the same to all your Configurable list widgets and they should now be set to required while showing the required asterisk in the hint text.
If you need further assistance, please let us know.