I'm looking to install a Leviton Decora smart dimmer, 2nd gen to replace a switch in my master bedroom. I unscrewed my current switch from the wall and found the following set up - 3 black wires, 2 white wire. Two of the black wires are screwed together with a wire connected to the switch. The other black wire is connected to another part of the switch. The white wires aren't connected to the switch, just to each other as a pass through.
On the new switch, I need to connect to line and load connections, a neutral connection and a ground connection.
From other posts it looks as though I can rely on the metal of the outlet to ground my switch given there's no ground wire.
What should I look to do with the other wires? I have a voltage tester being delivered in a couple of days too.