How Do I Integrate These Three System

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WCF

Dynamics-AX

SharePoint2013

I have three systems that i need to integrate and am new to systems integration. Am an intern in this organization and this project had been pending for one year after the guy who was integrating it left.

The system are arcGIS, Sharepoint and microsoft nav. The main purpose of the whole project is to manage land transactions such as land transfer ownership and selling, change of land use etc. Any changes that are done on arcGIS SQL database (such as change of land use field) have to be pushed to sharepoint. On arcGIS, these changes are tracked by a python application which updates the views that need to be read and the data pushed to sharepoint. The sharepoint component main task is to provide approval workflow and pushes any monetary transaction to dynamic Nav. The individuals components are working perfectly. To read from arcGIS views to sharepoint and from sharepoint to dynamic Nav, i am using wcf and it is working as expected.

How do i integrate these three systems, given the fact that the python application is called by a windows service ?