Install Sybase Mobile Workflow on the same machine on which you installed Sybase Unwired Platform and Sybase DOE Connector for SAP.
Sybase Mobile Workflow installs in the Sybase Unwired Platform installation directory. The installer adds the SMW for SAP Business Suite directory there.
In this document, the Sybase Unwired Platform installation directory is referenced as %SUPInstallation%. This is not a defined environment variable.