Acoustic zen hologram 2 with spades

Hi... Hope you guys can help me with this very novice question. I purchased a used pair of acoustic zen hologram 2 speaker cables with spade terminations. The spades on the amp end don't fit the binding posts on either my amp or speakers. They look a little narrower than the spades in the speaker end, which fit both the speakers and amp. I thought spades were just spades but are there different size spades or am I doing something wrong? The spades on both ends have an AZ stamp so I think they were originally produced that way. I posted a pic at the link below, the pair on the right are narrower. Guidance is appreciated

 http://www.fredmiranda.com/forum/utopfiles/65/3865.jpg