I use Liberty Speaker Cable and Liberty ZB03 Banana connectors. Liberty has a Spade Connector ZA02-II that works the same way. I strip cables the old school way, razor knife and wire strippers.
Wago locking connector are much better than butt connector because they do not require a tool to terminate them and they are reusable. If you have to remove an in-wall you just lift the locking arm to release the connection. You dont have to cut and strip the cable again like you would with a butt splice. Wire nuts work but come on people!
All Trade Razor Knife
Wago 222-413 Connectors
Liberty ZB03 Compression Bananas