2 person, when to talk to a coach

[LocDog249]

So I have worked the past 10 years in a state that utilizes 3 person mechanics for varsity (7 years actually working varsity) and I recently moved to a state that uses 2 person. My question is this: When during the game do you talk to the coaches? With 3 of us, there is 1 official in front of a coach, and you are usually able to explain your call that they have a question about without interrupting the flow of the game. In 2 person, I am finding it difficult as to when to: A) explain something to a coach they have a legit question about, B) stop their whining about calls/ no calls.
When is a good time to approach these coaches? When you are in front of them during action, you usually aren't right in front of them and there is a lot more that you have to watch for.