Just unzip and put these files inside the commands folder
http://moi3d.com/forum/get_attachment.php?webtag=MOI&hash=e96f49498fe8971448bbf73b80f86141&filename=Wire2.zip

Draw any "one" profil even "curvated" ( closed or not ...if "not" of course your cables will be also "open") , draw any volumes with faces

Run the plugin and follow it
so Select the "Source" Profil
Pick first Point on a face (even a point on the empty space!!! )
Pick second Point on another face (even a point on the empty space!!! )

That all! Have fun wiring! :)

Here points are on the empty space! :)