Please have a look at the following document through which its possible to connect to nosql database like mongoDB using splunk db connect app.
As mentioned in above link im trying to configure mongodb[new database connection] in Splunk DB Connect app.
But im not sure what i need to mention as database type.
In splunk db connect we have only below options and the requested one in above link is :tpch[which is not present in below list]
Microsoft SQL Server
Correct me if I am wrong but tcph is mentioned as a database name in the above link. right?
Apart from that did you follow the instructions and restatred splunk after making those changes stated in the above document??