Hi Kevin,
The HANA Output Adapter is one of the adapters that is a part of every installation (assuming you installed ESP 5.1 SP04). It was not available until ESP 5.1 SP01. I know one of the links on the download site takes you to the ESP 5.1 GA release which did not have the HANA Output Adapter. Double check the version you installed. If you did not install ESP 5.1 SP04, see my blog post here on how to get it:
Getting the latest release of ESP from the SAP Software Download Center
If you did install SP04, it is already a part of the product. Use the "F6" key to toggle ESP Studio into the Visual Authoring mode. Then expand "Output Adapters" palette and choose the "HANA Output Adapter" by click on it once and then clicking on the canvas once. See the attached screen shot:
Make sure you have installed the HANA ODBC driver and add an entry to ESP's "service.xml" file as described here and you should be good to go:
Thanks,
Neal