How do these electrical connectors come apart? on 2002 Toyota Avalon

My starter started clicking and the engine would not turn over. I suspect the starter or solenoid. When trying to get the starter out, I just cannot figure out how to get the ignition wire out of its connector. I looked for something to push or pull or something but cannot see anything. Where is the handle for this thing?

Is it the small wire on the solenoid ? if so you should be able to take the nut off at the solenoid