I have a Jensen bracket but previous owner changed the Jensen tv to an LG
My tv bracket hangs on two horizontal parallel rods about 16" apart. The top rod has an angle iron piece across the top rod that is secured by two screws, one in each end at the top and behind the tv. Had to use a mirror and flashlight to figure it out. The screws are socket head cap screws with lock washers. The angle piece keeps the top of the tv hanger secure on the rods. I keep the cap screws finger tight, I'd never find them with an Allen wrench.
The other 2 brackets in my fiver have a chain that releases the tv mount latch. Much easier to deal with.