I personally add silver solder to the end of the bare speaker wires while in a C shape, and "always" screw them on the posts directly for better conductivity and reliability. Never been a fan of any plug in type connectors or spades. I don't know what material the jumpers on your speakers are made of but at that price they should be gold plated pure silver. If not, and if you are handy, you can buy silver plate (.999) in just about any dimension and gauge you want and just drill holes and screw them to the binding posts. You'll then have the most conductive metal on earth! Rio Grande Jewelry Supplies is a great place to buy silver and you would end up with better jumpers than any I can think of. I used to do that but the speakers I currently have are all bi amped and have no need for jumpers.
Bananas vs Spades - for Jumpers?
I know it's well established that spades are the best when given the choice. But I'm wondering if that applies to jumpers too, when you would need to have two spades on a single speaker terminal - one spade from the speaker cable and one from the jumper?
I have Nordost Valhalla 2 jumpers with bananas on one end and spades on the other. I did this because my prior B&W 802 D2 speakers didn't tolerate two spades on one terminal all that well. But I've since upgraded to Audiovector R6 Arrete speakers and the terminals would easily accommodate two spades on one terminal. I wouldn't bother asking this question, if it weren't for the fact that the bananas are so much looser in my Audiovector terminals than they were for my B&W's.
So I've pretty much answered my own question, I think, but I am wondering what others have chosen for jumper terminations.