Draw a path to connect two nodes without intersecting other node + d3.js

I am using d3-flow-tree ( here ) to display my node tree as a flow layout. And add another g-element to represent the connection between the two nodes (by controlling another diagram with flow -layout).

When drawing links from one node to another, it should be a rectangular path that does not cross another node, like an attached image

you need to find a possible accessible path. Any suggestions or ideas are welcome.

Thanks in advance