Connecting toad to OracleDB using toad (Command Line)

I am able to successfully connect to toad using the following parameters from CMD

C:\Program Files\Quest Software\Toad for Oracle 12.1>toad.exe -c username/password@server:port/SID

I am also able to successfully connect using the following command

POD =(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST =PODS.GATE.COM)(PORT = 1521)))(CONNECT_DATA =(SID = ODS)))

But every time I connect to new DB it opens new toad instance. I want the new session to open in new tab in already already running Toad instead of opening a new instance.