lock or solder the speaker wire in the banana

WBT uses a system of a crimping barrel that is solidly crimped to the wire. That crimped part is then placed into the banana and that is screwed down tight.
All WBT use that sort of system.
So you want to buy some of the WBT crimping bits to use with the bananas.
I really doubt you could 'sucessfully' solder directly to the WBT body..(solder yes, with great results no)
So go buy some of the crimping bits from WBT and go to it.
(I have an extra 50 or so of the crip bits as they come in different sizes just to keep spares around.
The WBT are great because so easily reusable with new crimp bits.)

Link to crimp sleeves for WBT:

http://www.parts-express.com/wizards/searchResults.cfm?srchExt=CAT&srchCat=190

Thanks, Elizabeth, you are right, the clip is required, I was actually planning to solder the wire, there is a space left in the plug enough for the solder tip to go in.
But when I got it I found out there is another obstacle with one hand operation on these, questionable. I was using WBT-0144 on my interconnects, on those I could use just one hand to tighten the plug. But on 0644 it looks like I need both hands, was a little surprise for me. I am thinking I will go back to standard less fancy bananas :(
Thank you for the response.

Awhile back I removed the crimp on spades from my silver Pure Note Cerulean speaker cables and soldered on some bananas. The resulting sound was surprisingly awfull. I cut off the soldered and installed with crimp tool new bananas to good effect. No more solder for me. Thanx Elizabeth for the reminder on crimpsleeves, I'll get some. Mike