You are correct.
Is your objective to have a setup similar to this? Note the short, medium, & tall risers on the 3 bikes.
If so, you will have to use a different set of aerobars. I created a set of "kilo bars" using 3T system with the extended risers back in 2010 or so when they first came out with the modular system. It was awesome.
I sold them when I realized that riding the Kilo was for fools and madmen.