Good Afternoon, I took delivery of my brand new Stumps Baby yesterday. I ordered it with the BBQ Guru. I'm sure ill feel stupid when someone explains this but I can not figure out how to attach the fan to the adapter for the ball valve. The adapter for the ball valve is threaded like the fan should screw in but on the end of the fan there are no apparent threads and just a rubber o-ring that make me think it just plugs in or snaps in. I just didn't want to force it and brake something. Thanks for the Help.