Need to provide a Surround SCM 'Branch source' for multibranch pipeline. Multibranch pipeline jobs have become standard for most organisations.
 
At the moment there is no 'Branch Source' drop down for Surround SCM:
 
    http://www.seapine.com/knowledgebase/index.php?View=entry&EntryID=761
 
You can try using 'Single repository & branch' but there is no way to add credentials (it's blank in the drop down).
 
Adding to 'Branch source' is the standard expected SCM plugin interface.

Reproduction Steps:

1. Open Jenkins with Surround SCM plugin installed.
2. Create a new 'Multibranch Pipeline' job.
3. Click the 'Add source' button under 'Branch Sources'.
4. No Option available for Surround SCM.
    **