never mind ... found my own answer
Edited by DippedNuggetSecondary Weapons Attack
It's not that secondary weapons don't get the bonus, it's that only primary weapons get the bonus. If you look at pages 11 and 12 of the rulebook, you will find these:
...if he is targeting a ship at Range 1 with his primary weapon, he rolls 1 additional attack die.
...if he is targeted at Range 3 by the attacker’s primary weapon, he rolls 1 additional defense die.
Thanks