What is the correct call?

[RecRef]

Reviewing past Federation tests for the upcoming IAABO test. One question has me stumped; “It is an alternating possession throw-in when A1's throw-in lodges on a basket support.” Answer is given as false based on rules, 6-3-3d and 9-2-8. Both only report a violation if the ball lodges between the ring and the backboard or comes to rest on the flange.

Ok, the rule is the rule. But, what is the call if the ball does lodge in/on the basket support????