The filename you're after is: onPlayerRespawn.sqs like snYper said.
Just create a new file, There's no system default for that one.
The file onPlayerRespawnOtherUnit.sqs is called when the player dies and you have respawn = "side" or respawn = "group" active.
The file onPlayerRespawnSeagull.sqs is called when respawn is not active.