Quoted from colonel_caverne:
Sorry to ask but what is the Danesi lock?
Since nobody seems to be helpful here: they refer to “the Denesi lock” as the physical ball lock for multiball on Total Nuclear Annihilation. Scott Danesi designed this game and the ball lock is awesome and unique.
Take a look at some gameplay videos like the one from Deadflip and watch closely to the ball being locked in the upper right part of the playfield. Has nothing to do with Star Trek ball lock.