Here is the way I did it on my UDS using my Maverick Remote Smoker Dual Probe Wireless Thermometer ET-73 (the
is the newer version by the way).
Note the close-up on the lower right hand side of the pic.
I am able to run all my probes and by pointing the nipple down, it does not let much heat or smoke escape. If I rotate it up, it makes the UDS appear to be smoking a pipe, lol.