Question Idea to draw wiring for Unity model

I have a vehicle model like this:

Now I would like to draw electrical wires for this model (in form of curve). Each wire connects 1 point on an object to 1 point of other object. The objects are listed on Hierarchy bar.


I have tried to export FBX file and draw curve on Blender but it is difficult to catch point on Blender.
Is there any function to draw wires on Unity ?
I need to add color to the wires also.
If anyone can show me the whole process to draw colorful wires in Unity, I'm so grateful.