Tackle is just an old fashioned word for equipment so it's the gear a man will need on his wedding night - he hopes. It's nothing to do with fishing or lures at all.
As the nurse placed a bowl of steaming hot soup on his lap, the old chap exclaimed, "Mind me wedding tackle, dearie!"
A classy term to reference the entirety of one's manhood. The term includes the penis, scrotum and BOTH testicles; however it is acceptable to still use the term in the instance one may have just a single testicle.
Steven used his weddingtackle so many times before the honeymoon ended, Martha was afraid it was permanently damaged!