Hi Steve,
I've followed the videos in HANA Academy, they are very descriptive and worked as a charm for me.
Smart Data Access:  Connecting to remote M... | SAP HANA
Smart Data Access:  Working with a remote ... | SAP HANA
The only difference in my case was that I had to copy manually the odbc.ini file in /etc/ to the .odbc.ini file in /usr/sap/<SID>/HDB<SN>/.
I mentioned what I had to do here: Re: Smart Data Access to Sybase IQ error