SAP has recently released updates on OSS note 1976948 – Update for document “Integration of SAP TM and Event Management”. This OSS note gives us necessary information to configure integration of SAP TM and SAP EM.
SAP Transportation Management 9.1
SAP Event Management 9.0 with SP4 or higher
Go to above link and download it. As per this document, most of the configurations are preconfigured in SAP TM and SAP EM if you are in these latest releases.