How to extend provided data in Meteor.onConnection(callback)

I was wondering how could I extend the data that server is getting form the client per new connections.

Now I have the following data by using Meteor.onConnection(function(data) {console.log(data)}) but I would like to add here some extra information such as device information when using cordova

  id: "L6dQasAgSJajTiLmn",
  close: [Function],
  onClose: [Function],
  clientAddress: "",
  { "x-forwarded-for": "",
    "x-forwarded-proto": "ws",
    host: "localhost:3000",
    "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:54.0) Gecko/20100101 Firefox/54.0",
    "accept-language": "en-US,en;q=0.5" }