rebuilding vm24 with acc pump for dummies

Trying to better understand the structure and function of these carbs so I can someday be less of a carb dummy. I found some good diagrams and videos but have yet to see the float bowl connecting tubes explained. Are they just there to equalize fuel levels or do they serve some other purpose?

accelerator pump, dummy. 

Bowl rubber tubing, like these? Not sure i understand the question? The upper short rubber tube shown is to equalize bowl to bowl chamber pressure because two barbs are provided per complete set so they are tied together. Lower tube is for accel pumped fuel per each nozzle in venturi.    

I answered my own question. Yup it was the accelerator pump tubing. When I asked the question I didn't have the carbs in front of me. Once I did, the answer was obvious.