debate between me and another

[representing]

I had a debate with one of my officiating buddies. He was told about this situation by another official who had this situation.

with just a few seconds left in the second quarter, A1 has the ball and is going for a layup. B1 fouls A1 just as the time expires. The shot is good. In frustration for being fouled, A1 gets up and slams the wall, resulting in a technical foul. The referees gave A1 his one free throw, and then gave team B two technical free throws for the technical foul. After this, it was halftime.

Here is where the debate comes in. How do you start the next quarter? Is it a throw-in for B as a result for the technical foul on A1 and do not switch the arrow? Or, do you go to the arrow?

I'm not going into how my buddy and I debated this out, as we had like a 30 minute debate on this. I just want to know what you guys think and then I will go back to my buddy to say what y'all said. I also emailed our Rules Interpreter to see what he had to say.