This isn't a new question, and there are many paths forward.
Also, there are many providers of spade to pin solutions, to answer your question.
Using the speaker cables of your choice with your own unmodified speakers should not be a hand-wringing decision.
You will find out if you like the result after living with them for awhile (more the connection reliability than the sound, imho, but that counts for jack).
Have fun.
https://www.monoprice.com/product?p_id=9438
https://www.bluejeanscable.com/store...ctorcables.htm
The cheaper ones will eventually break off inside the JBL terminals.