CRM PlugIn/Activity to save attachments from Notes to a SharePoint Document Location.

Hi all

I am using CRM 2015 on premises and SharePoint 2013 on premises.

When a new Opportunity is created, I want to extract notes attachments from the Originating Lead and save them to a SharePoint Document Location associated with the newly created Opportunity. I currently have an incomplete Workflow Activity which gets the attachments but I can't seem to find a way to save to the SharePoint document location. 

Any tips are welcome. Thanks in advance.