Hello All,
Hope this helps someone here who wants to integrate wM IS with Mongo DB with the help of Big Data Drivers provided by SAG (additional license cost). Got my issue resolved finally 
The settings used are as below
Mongo DB version 3.4
IS 9.12 (IS_9.12_Core_Fix10), wM JDBC Adapter 9.10 (JDBC_9.10_Fix8)
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Connection Properties
Transaction Type NO_TRANSACTION
DataSource Class wm.jdbcx.mongodb.MongoDBDataSource40
Server Name localhost
User
Password
Database Name myNewDatabase
Port Number 27017
Network Protocol
Other Properties SchemaDefinition=C:\tmp
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Make sure to have the Big Data Driver for Mongo DB on the path below
\IntegrationServer\instances\default\packages\WmJDBCAdapter\code\jars\static\mongodb.jar (my setup uses this)
or
\IntegrationServer\instances\default\packages\WmJDBCAdapter\code\jars\mongodb.jar
Any questions, reach out to my email.
Thanks
#Integration-Server-and-ESB#webMethods#Adapters-and-E-Standards