Able to succeed, but no idea why it worked what I did as the mechanics are almost completely hidden. Furthermore... Spoiler many visible thing were not used at all.
@SAS Please use a spoiler tab for solutions. Click the + button on the right of the smileys and click Spoiler.
This particular jail break was a real thinker. I was about to give up, when I spotted a key component. Ah so, I see. Took B thru a second time to confirm the solution. Good'un!