This design is meant to hide the Airport cables and allow you to plug it to a socket near an ethernet port. 

If the airport case is not tight enough, you can use tack putty / poster putty to give it some adhesion.

The design has a socket mount, a lid and a piece to secure the socket so the does not slid back when you plug it in.

There are also some holes you can use to secure the cables in place. 

Tested on a Prusa MK3 with .3mm in Draft mode.