Thermoquad choke question

I'm doing a conversion on my 72 Coronet 318 from a 2-bbl BBD to a 4-bbl. I have a factory 72 340 Thermoquad intake and a 72 6139S Thermoquad carb to rebuild. The intake has nothing for the choke mechanism, and I didn't get one with the carb. Does someone have a photo of what this should look like? I'm nobody's idea of a perfectionist or numbers-matching guy so I'm not after NOS parts. I see some stuff on eBay that's supposed to be correct but I'm hesitant to order one without knowing it's the right critter for the job.

TIA!