Hassio on docker - usb declarations

Bit of a noob question, but I’m looking at moving my current setup from Raspberry Pi to a Ubuntu server setup. I’ve done the research and played with docker, no problems setting that up with portainer etc. I want to keep things as vanilla as possible so have gone down the route of the standard docker script for hass.io.

My question is how do you declare device connections for the likes of usb wave stick and others. I know how to do it for a straight docker or docker-compose setup, but can’t see reference to establishing environment variables with the hassio-supervisor script.