photon server RPC to client

Hi.

I'm currently using photon cloud. And trying to use photon server for load balancing. How can i RPC to client??

in client's script, i can do

[PunRPC]
public void OnStartGame()
{
PhotonNetwork.room.open = false;
PhotonNetwork.LoadLevel("Main");
}
public void StartGame()
{
if (PhotonNetwork.room.playerCount >= 2)
{
photonView.RPC("OnStartGame", PhotonTargets.All);
}
}
this

but what about in server's script.... how can i do "photonView.RPC("OnStartGame", PhotonTargets.All);" this thing???