While most images online of the 16" show the altitude brake in the usual position, there are some which show no brake on that side. So I assume it is located on the other side. Odd choice.
http://www.shopatron.com/products/productdetail/16%22+LightBridge+(f/4.5)+Truss-Tube+Dobsonian/part_number=1645-05-02/1323.0.1.1.28926.45970.0.0.0