You can indeed - i've taken a snap of one of mine. There is a small part removed so you fit a cable (this is the MA-MNT-MR-11) I have slimline ethernet cable but a normal one will fit. Its only on one side though - so if you are coming from a different direction you may need to modify the bracket.
![IMG_4728.jpg IMG_4728.jpg](https://community.meraki.com/t5/image/serverpage/image-id/8638i434B1BB8B791AC71/image-size/large?v=v2&px=999)