Audioquest Rocket 33, anyone knows how to take off the banana plug end?

Hello all! I have a 10ft audioquest rocket 33, the original banana plug is sorta darkish, i gotta a hold of Banana 500 series that i’d like to swap it with. I do not see any screws on the original banana plug, anyone knows how to remove that end in a safe way? 
Also, will it be ok if i put gold banana 500 on the amp end, and silver banana 500 on the speaker end? Thanks