Choke Lever for Generac OneWash PN 0064140

I am missing a part/lever that connects the metal piece that comes from the choke to the part that opens/closes the throttle valve. I suspect it's some plastic part that screws into the threated, cylinder piece that you can see in the section "missing part". My guess is that it came lose when I used the power washer the last time. I am having a hard time finding this part. I can buy the whole carburetor, but it doesn't seem to include that piece. Does anyone know, where I could get the appropriate replacement part?
 

 

Thanks! The lever doesn't work the way it should, though. My pressure washer has the choke in the front, i.e. you pull it out and push it back. With this set, the lever has no hook or anything to connect to pull mechanism to the lever. Instead, it makes the choke on the front inoperable. Instead, you have to reach that lever right next to the carburetor. It's kind of hidden behind the front plastic cover and takes a bit of practice to reach. It does fix the problem but not in the expected way. 

It does look like in the diagram of your post (#2). However, I don't see how it would connect to the metal piece marked "from choke" in the image in the original post. The choke control is on the front panel of the OneWash (see red square in the image below). That control pulls/pushes on that metal piece which controls the choke. But the lever included with the carb doesn't connect to that metal piece. The plastic cover for the carb has a cutout where this lever can stick out for manual control (not via the choke control on the front panel but directly at the carb).