Wall Cutter is a foundry vtt module that offers a few new tools that accelerate the creation of walls.
The tools are selected from the menu opened by double-clicking a node from a wall.
This is the simplest tool to use. It simply creates a new connection point in the center of the selected wall.
Using this tool you can incorporate any wall segments that intersect the selected wall or that overlap said wall.
The module can be found on the foundry vtt module installer.