The SAMIS block should appear by default on the left hand side of your Moodle course within the Course Toolkit. Further details on working with blocks can be found at Managing Blocks and The Course Toolkit.
Should it not appear, the SAMIS Integration block can be added to any Moodle course as follows. Only someone with Teacher permissions within a given course can add additional blocks to it:
Next, you may wish to view the instructions on Understanding the Manage Mappings interface.