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Digizuite Deployment Manager
You should add Add a new portal for the Sitecore connector, so you have the option to set the . The reason why this is needed, is because we want to control the option Root channel folder of MM's content and Unique channel ID. We want the channel folder to point at the sitecore channel. And also control the upload channel id, so we can setup automations that can auto publish to the Sitecore channel. Remember to hit the Deploy Environment button once you have created the new portal, otherwise it wont show up in the Media Manager.
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Portal config manager
You should now see the newly created portal under the Portal config manager.
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Locate the configuration parameter Root channel folder of MM's content and set it to point at the Sitecore channel. Then find the Unique channel ID and set it to for instance sitecore, what you type in here is up to you. Just remember it when you setup automations.