Create a copy of the OBD shortcut and in the Properties > Target add “OBM_PARAMS=” followed by the argument as shown below.  This will pass the argument to OBM once you open the OBM file after you have opened the OBDX file.

 

"C:\Program Files\Bentley\OpenBridge Designer CONNECT Edition\OpenBridgeDesigner\OpenBridgeDesigner.exe" OBM_PARAMS=-wr\\abcdafgh\util\config\bentley\workspace\obm\configuration\