I'm running a single nozzle in the upstream end tank of my TMIC right now with success. I wasn't convinced that I'd get even fluid distribution with the nozzle close to the TB.
I may eventually go for a dual nozzle system with each positioned adjacent to the inlet pipes but for now the nozzle is simply positioned between them.
I do get a little excess fueling on shifts which is likely residual fluid in the IC but not enough to cause an issue. My system allows me to prime from the driver's seat so I can also use it to combat heat soak in theory although the car obviously doesn't idle that well ingesting fluid so I need to pulse it for a second or two at a time.