The CA Identity Manager Connector information states the following pre-requisites for the Oracle Siebel Endpoint Connector.
The Siebel mobile web client or the Siebel dedicated web client has to be manually installed on a machine, before or after CA Identity Manager installation, where the C++ Connector Server is running. The Siebel web client version must be the same as a version of a managed Siebel server. See the Siebel documentation for more information.
The Siebel Application Object Manager has to be running on a Siebel Server. See the Siebel documentation about Siebel Object Manager installation and configuration.
Component : CA IDENTITY SUITE (VIRTUAL APPLIANCE)
The "Oracle Siebel mobile web client" is required for connectivity with the CA Identity Manager (IM) as IM uses the "Siebel COM Data Control object" to connect to Siebel server and the Siebel Client provides all the required dll's to enable that connectivity (fore example, sstchca.dll - SiebelDataControl.SiebelDataControl.1).