Cable Plug for my Versions of the Lithophane Lamp

Hello,

in November / December 2018 I printed some Lithophane Lamps for our Parents.
This one: https://www.thingiverse.com/thing:3536197

I looked for the best way to illuminate it. So i found an 1m long LED-Stripe with Cable.
one Version with Batteries an one Version with a PSU-Plug.

Both had a thin Cable witch has a lot of Space in the Hole of the Lamp. So I designed this little Plug to clamp the Cable.

The Part with the Flat and the Chamfer is the lower one. The halfround part is