+2 for the Cardas. Available on Amazon(where I got mine)
https://www.amazon.com/Premium-CGMS-Banana-Adapter-Connectors/dp/B00SG3Z922/ref=sr_1_1?ie=UTF8&qid=1501969704&sr=8-1&keywords=cardas+banana+to+spade+adapter
They fit the banana plugs snugly, so you don't have to worry about them slipping out.
B
https://www.amazon.com/Premium-CGMS-Banana-Adapter-Connectors/dp/B00SG3Z922/ref=sr_1_1?ie=UTF8&qid=1501969704&sr=8-1&keywords=cardas+banana+to+spade+adapter
They fit the banana plugs snugly, so you don't have to worry about them slipping out.
B