Alternatively : Select an edge loop running throughout the mesh, right click -> create shape. You now have a spline in your scene following the path of your wire. Apply a Unwrap UVW modifier to your object. Enter Polygon mode and under wrap mode choose spline mapping and select your created spline. 3dsmax will now do a…
Anyways alternatively you can select the spline you created from the loop, enable viewport rendering, adjust its thickness and number of sides and check generate mapping coordinates. Then you can convert it to poly and have a nicely unwrapped mesh.