Legrand speaker support

In order to fit to a Legrand speaker outlet, I designed this support. This support is modular, that means you could design all things you want to install on the support (phone holder fitted on a power outlet etc...).
The support fits on wall outlets as a bezel (remove existing bezel before, of course) but due to the weight of a speaker, I added a point of glue on the small legs to secure.
A M5x10mm screw is installed on the back of speaker.
I used PETG but it could be made from ABS.