Lol. This does seem like something that would be a good idea to include with the speakers. At $30 I'd just go ahead and order them. Axiom will get you back in other ways, like the coupon last year.
But multiply that by 3 back ports per speaker (and 1 on the front) and you are getting up over $100 after taxes.. A bit of a pain in the pocket book.. I've just bought new Computer Speakers so any more coupons are a waste for me as I don't see a need for much more speakers. All that is left is a Sub and I can't justify the $1500+ cost for that right now.
Axiom: ADA1000, LFR1100, VP180, QS8, EP500, M3, M3comp
AudioSource: Amp One/A