How to make parallel asyc calls

Hi All,

Couple of questions.
1. When the gadgets are loading first time, i am not seeing any event dispatch to load() function, may i know where is it called from or invoked?
2. On page load i have to make 3 or 4 api calls, what is the common place to do that? that is not related to any component, but needed for the whole page.
3. Instead of local, I want to make call to another api server, i think for this i can just the localhost:3003 to my api right?