... After you pivot and settle into the shot, when you are ready to take the shot ...Where exactly do you focus prior to executing the shot? What are you looking at? ...
For an answer to your question, please ignore the ongoing debate about the nature and value of CTE. For your question, let's just accept that once you pivot to center CB, you have put the stick on the line of aim that you want. So where do you then look?
Hal Houle taught that you should not look up toward the OB, but just continue to look at center CB and stroke straight through it on the line determined by pivoting to center CB. So that's a CB-last-look approach.
But some people, probably the vast majority, are uncomfortable with the last look being at the CB. They feel it is better to look up toward the OB. So what should they do? They should find a target based on where the stick is pointing (or where the stick will be sending the CB) after the pivot. That is -- pivot to center CB then look up to see exactly where the stick is pointing (you could use the center or an edge, e.g.) or where the CB will be sent, and find a target. The target could be a point on the OB, or an edge of the OB, or a point on the table, or a point on a nearby ball, or a point on a rail, or a certain "eclipsing" of the OB by the CB. Then take a couple warm-up strokes using that target (and center CB) and shoot.