I'm not aware of SSH router option, I suppose it's purpose is to access router from public network.
Or to access local network via SSH, you only need to setup SSH server on target computers, and open port 22 in router.
But to hide SSID, that's easy to do in router configuration, however it's purpose is not to stop hackers finding SSID, finding out hidden SSID takes just a few seconds.
It's purpose is only that it's hidden for neighborhood and not broadcasted.
Or to access local network via SSH, you only need to setup SSH server on target computers, and open port 22 in router.
But to hide SSID, that's easy to do in router configuration, however it's purpose is not to stop hackers finding SSID, finding out hidden SSID takes just a few seconds.
It's purpose is only that it's hidden for neighborhood and not broadcasted.