So, we all know that once the Quarry is done, it leaves a HUGE hole in the ground, which, if you're using the Quarry underground can be a breeding ground for Monsters. How the Torch Placer Module would work is once the Quarry Reaches the bottom layer or whatever layer was set on the Y Setter is it would place Torches on that layer where the light level is on or below light level 7.

Quarry, inserted torch module, places torch like this picture. (Taken in MC 1.12.2)
Implemented in v12.2.3