Main features:

1. Can accommodate any cable (endpoint size doesn't matter).

2. Easy to print.

3. Solid, but flexible connections.

4. Easy to attach.

5. Decent look ;).

I recommend attaching the top mount with at least 1 screw, the bottom mount can be fixed with strong double-sided tape.

Onshape document if you want to modify.

Print Settings

Rafts: Doesn't Matter

Supports: Yes (use support enforcers to select only part that needs it, check photos)

Resolution: 0.2

Infill: 15%