On One Pompino owners...

As I run Vs on my Pomp, I'm looking at the currently-unused flying cable stop on the back and wondering if I can somehow turn it into a light mount?
Anyone ever mounted a rear light there?

Ok, so I did a little sketch; I'd need

• a short piece of thin threaded bar that would fit through the existing cable stop hole
  
• two or more nuts for the threaded bar (shown here in orange)
  
• a short piece of flat steel, twisted through 90 degrees halfway along and drilled once at each end (shown here in pink)
  
• an old CatEye mount to bastardise (shown here in chartreuse)
  
• some washers
  
  

EDIT : Already realised I could use a bolt in place of the threaded bar, if I can find one.