Hi,
The wsdls are supplied in the add-on packages that you download from the Marketplace. Find them under 'External Definitions" in the ESR once you've installed the package.
https://help.sap.com/erp_sfi_addon10/helpdata/en/8e/a446ea7f7b4c0692a4603cff6fabdc/content.htm
However, I've been told SAP are moving away from SOAP/SF API and all new developments will be targetted at the ODATA APIs. I'd advise looking into this. You can find the metadata of all entities on-line at:
https://{root URL of your SFServer}/odata/v2/$metadata
More info: https://http://help.sap.com/hr_api
Cheers,
Richard
Message was edited by: Richard Tiernan (hate this Editor)